Qfh satellite antennas. We have two quadrifilar helix antenna models available.

Qfh satellite antennas When you have a satellite orbiting the earth, even if the antenna is pointed straight down, its polarization to you on earth will change as it goes from horizon to horizon. I have been asked many times if I can Using a QFH antenna will significantly increase your ability to receive the helix signal from horizon to horizon. NOAA Satellite Signals With a PVC QFH Antenna and Laptop : This instructable covers everything you'll need to get started in being able to receive the APT (Automatic Picture Transmission) signals from the NOAA Satellites (NOAA-15, 18, and 19) flying overhead (and can be a foundation for listening to other s… May 17, 2019 · A quadrifilar helix antenna (QHA), with an improved isoflux radiation pattern for S-band satellite ground stations, is designed and fabricated. John Coppens ON6JC/LW3HAZ describes how to make a Quadrifilar Helicoidal antenna Taming the QFH Antenna by Bill Sykes G2HCG and Bob Cobey G0HPO This is a guide aiming to help you build an inexpensive APT ground station. Keep in mind that the satellite continually sends information is it views the earth so there is no "stop" and "start". The antenna is designed for the NOAA POES 137. <HOME <OH2GVB <Electronics OH2GVB Quadrifilar Helical Antennas Simulation of QHAs <> Other QHAs I've built The Quadrifilar Helical Antenna (QHA, or QFH if you prefer) has two defining properties: (1) Its radiation pattern is just about as perfectly hemispherical as you will ever find. Abstract—The objective of this study is the design and implementation of a Quadrifilar Helix Antenna (QHA) for telemetry, tracking and control of a Low Earth Orbit (LEO) satellite. Sep 29, 2025 · Over the past few years, interest in satellite communications has increased exponentially, and this has led to an increase in demand for QFH antennas for different purposes. DIAMOND DPKE137 Receiving Antenna for Weather Satellite NOAA & ACARS - SO-239 HRO Discount Price: $310. In this video, we'll go through the theory and practice behind how to build a QFH antenna. I have seen Jan 27, 2015 · My setup, using a homemade QFH and a LNA-100 (NOT the LNA 1000, this is a ~$30 tv signal booster that works great). The Orbcomm network is very good at servicing short messages (sensory data, tracking and Internet of Things or IoT) from assets worldwide. 20 votes, 10 comments. Jul 26, 2020 · During my pursuit of the best antenna for receiving NOAA/Meteor images (I already built a Double-Cross antenna and a Turnstile), I decided to try a QFH antenna. Here are my captures, any tips on improving the quality? Any help is appreciated. I'd seen these Quadrifilar Helix Antennas (QFH or QHA) before and was always intimidated by the complex looking architecture This project details the construction of a compact, circularly polarized Quadrifilar Helix Antenna (QHA) designed for 146 MHz operation. The KE-137 is a quadrifilar helicoidal (QFH) antenna. Just finished building a QFH antenna to see if I can capture the new Meteor M2-3 and improve NOAA APT. But it’s, of course, optional - a computer with the SDR is perfectly enough to start your radio adventure. Do you mean QFH? I use quadrafilar helix for 137 MHz weather imagery. Aug 9, 2019 · @BrianK1LI so, the QFH is supposedly an excellent antenna for satellite reception since it's truly omnidirectional for 180 degrees. Antenna setup I did some digging into the LNA-100 and found that it does well enough for a general purpose LNA from 80-900 Mhz with very little noise. Files are made available on thingverse. This is where the QFH Antenna comes in, it's actually two antennas, a small one inside a bigger one, that is of the proper dimensions so that it blocks out surrounding interference and receives signals very well on the 137. Aug 31, 2023 · Circular polarized antenna for reception of NOAA meteorological satellites at 137 MHz, or ACARS transmissions at 135 MHz. Would you trade the simple linear polarization antenna design and the -2dB for the complex QFH antenna design? I already did. It’s best thought of as two full-wave loops feed in parallel. May 18, 2025 · Calculation and assembly of a QFH antenna for receiving images from weather satellites, as well as a detailed explanation how to setup SDR++ and SatDump to receive and decode images from NOAA-15, NOAA-18, NOAA-19 and Meteor-M N2-4. My old double-dipole antenna did quite a good job but you still had to move it around to ensure you didn't lose the signal as the satellites fly overhead. A helical antenna made of one helical wire, the most common type, is called monofilar, while antennas with two or four wires in a helix are called bifilar, or quadrifilar, respectively. LNA-100 Feb 15, 2016 · I have one dongle by chance, I used for DVB-T reception, and lucky enough, the dongle is one with the right chipset. However, Adams antenna is based on a very simple linearly polarized how to build a qfh quadrifilar helix antenna to download images from weather satellites a complete tutorial on assembling qfh antenna at home with simple and common tools. Mar 1, 2017 · Over on his blog Adam 9A4QV (seller of various RTL-SDR related goods including the LNA4ALL) has just made a post detailing a build of a high performance super simple NOAA/Meteor M2 weather satellite antenna. I chose to use 8mm pipe, and the Design by Bill Sykes G2HCG and Bob Cobey G0HPO). (2) Its radiation is just about as perfectly circularly polarized as you will ever find, in all directions In many QFH antenna build guides, they suggest a support in the middle of the antenna for the wires, the 12 AWG wire I got was pretty solid and I didn't feel it was needed, so I didn't install middle supports. This type of antenna is used to receive signals that are circularly polarized, such as APT weather maps sent by the NOAA satellites. 3 GHz frequency band. 1 During the satellite pass the signal reach 45dB S/n ratio hence there is a lot of signal to cover the 2dB loss due to cross polarization. This article describes how to make a quadrifilar helix (QFH) antenna easily, from inexpensive materials: uPVC plumbing pipe and RG-58U co-axial cable. The goal of this VHF QFH Antenna is to offer Radio Amateurs with space or community restrictions the ability to communicate via Easy Weather Satellite Reception with the QFH Antenna Anthony Mendina, NT5TM, August 27th, 2022 Version 1. Goodroe’s antenna. Mark Smith, of Halibut Electronics, provides an overview and status update of his EggNOGS antenna kit project. My current Raspberry Pi Zero weather receiver is using a V-dipole and SDR tuner dongle. Full-Size Amateur Radio Satellite QFH Antenna description The UC-4364-531 is a full-size Quadrifilar Helix Antenna (8 cm/3" OD x 30 cm/12" H) designed to operate through Amateur Radio satellites, without requiring an antenna rotator. You can also make the setup better using the LNA (low noise amplifier, that increases the power of very low signal) and a filter to get rid of The Ouadrifilar Helix as a 2 Meter Base Station Antenna Here's an easy to build VHF base-station antenna that works equally well toward the horizon or overhead. UHF Amateur Satellite Antenna (QFH) An independent review of this antenna was published in the November 2008 issue of QST Magazine [Ford, Steve, WB8IMY, "SHORT TAKES: Antennas. Details Circular polarised antenna for reception of NOAA weather satellites on 137 MHz, or ACARS transmissions on 135 MHz. QFH Antenna for Receiving Earth To ensure optimal reception of circularly polarized signals, it's essential to design and tune a Quadrifilar Helix (QFH) antenna. A Quadrifilar Helix Antenna for 137 MHz By George Goodroe, KF4CPJ After I became a licensed amateur radio operator in August of 1995, I received a QST magazine which had an article that explained it was possible with the right antenna, the Quadrifilar Helix antenna (QHA), to receive the 137 MHz weather satellite transmissions. John E. Most antenna designs for polar orbiting weather spacecraft are based on circularly polarized turnstile or QFH designs. Feb 20, 2021 · Building antennas is a time-honored ham radio tradition. Various papers have been published on helix antennas, so the operation is pretty well understood. Part II: Antenna Background The quadrifilar helix (QFH) is not a helical antenna. Mar 10, 2015 · Backfire resonant quadrifilar helix antenna popular for GNSS, communications and weather satellite receiving stations. I've also had decent luck with a simple V-dipole tuned to 137 MHz. The AS-49070 Quadrifilar Helix Antenna is a lightweight and rugged antenna which provides depressed cardioid radiation patterns in the 2. So, I downloaded SDR# a tested the dongle with air traffic listening. The QFH antenna described in this tutorial has been measured by a vector analyzer to correspond with NOAA APT frequencies at 137-138 MHz. RELATED WORK The some of the research works presented on QFH antenna :XiaozhongShui and Haibo Tang in their paper “S-band Printed Quadrifilar Helical Antenna for Communication Devices” presented the design of a QFH with good heart-shaped radiation pattern from 3. 45GHz, 3dB power-width of more than 160°, gain greater than -2dB in the azimuth range, the axial ratio lower This is the first in a series of antenna's aimed at the Satellite tracking community and will be a work in progress untill the prefect option is found. There is nothing original in these steps. The solution is to build an antenna that is properly polarized in all directions, hence the QFH antenna. May 17, 2019 · A quadrifilar helix antenna (QHA), with an improved isoflux radiation pattern for S-band satellite ground stations, is designed and fabricated. It was produced in direct response to popular demand from radio amateurs who wanted to experiment with satellite reception on the 2-metre band. qsl. The antenna I went for is called a QFH - quadrifilar helix - and appears to be only commercially available in expensive marine or professional versions. The cost of this project varies from 10 € to 50 € (~55 $) and makes use of 3D printing and multifunctional hardware such as amplifiers, filters and the RTL-SDR. Tech Minds combines the QFH antenna with a SAWBird Inmarsat LNA, but unfortunately finds that reception is too weak for any AERO decoding to be possible. The KE-137 is a quadrifilar helical antenna (QFH) Orbcomm Antenna description Orbcomm Antenna, model UC-1374-531S is a +4 dBic Quadrifilar Helix with dimensions: 16 cm/6" OD x 62 cm/24. However, there have been descriptions in the magazine of the Group for Earth Observation (GEO) of how to build a QFH using easily available copper pipe. Over the past few weeks I’ve been experimenting with different antenna designs specifically for receiving weather satellite telemetry around the 137 MHz frequency range. Listed under the Antennas/Quadrifilar Helix category that is about QFH Quadrifilar Helix Antennas. The performance of the antenna with respect to its beam Download scientific diagram | Side view of QFH antenna from publication: Design and analysis of Quadrifilar helical antenna for Cube-Sats using C-band frequency range for satellite communication Building a quadrifilar helix antenna (QFH) for NOAA satellite reception with an RTL-SDR Jim Haslett 2. These antennas are especially-made for NOAA weather satellite reception and are tuned to 137MHz to receive polar orbiting satellite A helical antenna is an antenna consisting of one or more conducting wires wound in the form of a helix. Due to the construction of the antenna the satellites are picked up at a very low angle above the horizon, but equally well when right over the antenna. Simple, effective antenna for satellite image capture and GPS. I'd really like to get into satellite reception and my discone just does not cut it. The antenna features a 1/2λ1/2λ helical design with a 2. We would like to show you a description here but the site won’t allow us. These a The VHF/Active UHF Amateur Satellite Antenna Kit, UC-AMSAT-KIT is a discounted pair of compact Quadrifilar Helix Antennas, designed to operate through Amateur Radio OSCAR satellites, which is available and sold at antennas. I'm at the point (shown here in it's current state. Because of its cardioid-shaped circularly polarized beam, QHA can satisfy requirements of satellite communications completely. 95* Buy It *After Coupons & Promotions. 2K subscribers Subscribed Jan 13, 2025 · QFH Antenna for the 144MHz / 2-metre Band This QuadriFilar Helix Antenna is a development of the original design for the weather satellite band. Back in 2017 we posted about Adam 9A4QV's simple V-Dipole antenna design which works very well for receiving NOAA and Meteor weather satellites at 137 MHz. The antenna makes a helix shape and looks like it would be interesting to build from scratch. This gave me a fantastic A Quadrifilar Helix Antenna for 137 MHz By George Goodroe, KF4CPJ After I became a licensed amateur radio operator in August of 1995, I received a QST magazine which had an article that explained it was possible with the right antenna, the Quadrifilar Helix antenna (QHA), to receive the 137 MHz weather satellite transmissions. QFH antennas offer excellent performance in satellite communication and radio astronomy applications, making them valuable tools for capturing signals from space. us store. 5 MHz frequency band that the NOAA satellites transmit around. GOES Antenna, model UC-4024-531 is a compact 402 MHz Quadrifilar Helix Antenna (QFH) designed to operate with 400 MHz NOAA GOES satellites and CLS Argos service. It is ground plane independent and compatible with both vertical and horizontal polarizations, making it ideal for terrestrial Typical ground stations have had success with simple wire antennas that can be commercially bought or made at home. For satellite reception tough, I do not have the right antenna, so I browsed internet and found several articles about QFH antennas. I have built a few different models over the years for various commercial customers, along with many for NOAA (and more recently, Meteor) weather satellites which transmit on 137 MHz. 5" H, designed for Orbcomm satellite use on land or sea platforms. Apr 3, 2024 · A novel design inspired by a child's toy, the portable gigahertz QFH antenna can be easily reconfigured for radiation patterns. Learn how to build your own DIY quadrifilar (QFH) antenna for 137MHz to receive NOAA and METEOR satellite images. Jan 13, 2025 · The answer: Use a Quadrifilar Helix Antenna! This strange-looking antenna, often named the egg-beater antenna (for obvious reasons), was invented in the 1940s and has become something of a stablemate for modern satellite communications, and also other uses such as wifi. May 13, 2013 · Here, YouTube user themrworf1701 shows a video tutorial on how he set up his weather satellite receive station. These NOAA Weather Satellites broadcast a APT signal with about 5 to 8 Watts at 2m band, and considering The UHF Amateur Satellite Antenna, UC-4364-531 is a full-size Quadrifilar Helix Antenna designed to operate through Amateur Radio satellites is available and sold at antennas. These have anecdotally been used for successful satellite work but should be avoided. This type of antenna is a lot easier to build compared to a QFH or turnstile, and it results in good performance if built and set up correctly. I wasn't Apr 19, 2021 · If you want to connect the antenna to the SatNOGS station you are going to need a Raspberry Pi, configured with SatNOGS OS image and settings. This is a highly anticipated kit by those inte Antena QFH Después de un tiempo probando diferentes antenas para satélites en V/UHF, decidí probar esta antena después de ver los magníficos resultados que le ha dado a Rubén EA5BZ. Mar 1, 2020 · Radio amateurs built Quadrifilar Helicoidal (QFH) satellite antennas at a workshop in Indonesia organised by a local branch of the national amateur radio society ORARI. Hey everyone, first time posting here. Therefore, it is amazing that after more than half a century, there is still a new twist to the helical Apr 15, 2018 · During my adventures with SDR (software-defined radio), the need for a proper QFH antenna arose. Learn the basics of QFH antennas (Quadrifilar Helix) and use our calculator to design your own. A couple of examples of home-brew S-Band antennas are shown below, on the left is a QFH omni, and on the right a wide beamwidth helical suitable for use as an omni. In most cases, directional helical antennas are mounted over a ground plane, while omnidirectional What is the real world performance of a fixed 435 MHz QFH antenna for LEO satellite receiving? How does it compare to a small 7EL Yagi that requires manual p Aug 5, 2019 · The QHF QFH antenna is another interesting teardown. Portune, W6NBC esigned for spacecraft use in the early days of space exploration, the quadrifilar helix (QFH) antenna has not gained much popularity on the ham bands. I was thinking of using it to listen to 2m sats, and later when I get my license, use it to tx as well. This is a 3D printed spiral support structure for the wires of a 435 MHz QFH antenna. I need a helix or a turnstile antenna… QuadriFilar Helix QFH antenna with circular polarization Diamond DP-KE137, for NOAA weather satellite reception on 137 Mhz and ACARS signals on 135Mhz. Over the years he notes that he's received a number of questions asking to clarify the design Quadrafilar Helix (QFH, QFHA, QHA) – one of the best performing antennas WX-137Q Turbo-tenna – National RF pre-built, stainless QFH antenna UC-1374-531R – +4 dBic VHF APT Weather Satellite Antenna The Bill Sykes and Bob Cobey QFH – Taming the Quadrifilar Helical Antenna: detailed instructions for building a QFH antenna from G2HCG and G0HPO Other high – performance and specialty Just built myself a 137 MHz QFH antenna. You can't beat an az-el circular polarized antenna for total performance but the QFH in my experience is a good choice for fixed antennas. Dopo una breve ricerca su internet, la scelta e Quadrafilar Helix (QFH, QFHA, QHA) – one of the best performing antennas WX-137Q Turbo-tenna – National RF pre-built, stainless QFH antenna UC-1374-531R – +4 dBic VHF APT Weather Satellite Antenna The Bill Sykes and Bob Cobey QFH – Taming the Quadrifilar Helical Antenna: detailed instructions for building a QFH antenna from G2HCG and G0HPO Other high – performance and specialty May 16, 2013 · Hello, I've taken it upon myself to build a QFH antenna for 435mhz to receive Amsat signals. See full list on antennas. Once relatively anonymous, this incredible tool has gained attention recently in many different fields and is particularly valuable for the You can find instructions on how to build one all over the place, and a QFH is generally a better performer than the easier-to-build "turnstile" or double-crossed dipole antenna. National RF provides consulting engineer services, and manufactures direction finding antennas, test equipment, communications receiving equipment and adjuncts, satellite antennas, voice amplification and audio equipment. This is called a "Quadrifilar Helix" or QFH Antenna. 6:1 aspect ratio, providing 4. Unlike traditional designs requiring copper pipe and plumbing skills, this approach enables construction with basic tools and minimal technical expertise. Was this a mistake? If anyone has any tips for me, please let me know. The article that I read (1) was by an amateur by the name of Buck Nov 30, 2018 · If you want to build an antenna to receive signals from a weather satellite, you will need a special kind of circular polarized antenna known as a quadrifilar helix antenna. His second post shows a beginners guide to the software that can be used to decode the APT signal in order to obtain a live weather satellite image. However, Adams antenna is based on a very simple linearly polarized Homemade QFH Antenna Made From Copper Tubing Used For NOAA Weather Satellite Images Fuzz The Pi Guy 10. We have two quadrifilar helix antenna models available. Its practical design resembles a spiral and helical pattern of its elements, thus enabling the magnitude and direction of electromagnetic fields to circular pattern during propagation. What do I need to build the QHF antenna? Quadrifilar Helix Antenna (QFHA) frequently asked questions and information when used with Low Earth Orbiting (LEO) satellites/Amateur Radio satellites. VHF Amateur Satellite Antenna description The UC-1464-531, +4dBic VHF Amateur Satellite Antenna is a Quadrifilar Helix Antenna (QFHA), measuring 16 cm/6" OD x 62 cm/24. The VHF+UHF Passive Amateur Satellite Antenna Kit, UC-AMSAT-KITP is a discounted pair of compact, passive Quadrifilar Helix Antennas, designed to operate through Amateur Radio OSCAR satellites. QFH Quadri-Filare-Elica 137 Mhz NOAA sat Ciao a tutti, dopo i test di ricezione dei satelliti polari NOAA in modalita' APT utilizzando semplicemente un FT-897 e un antenna TURNSTILE con risultati piu' che decenti, ci siamo cimentati nella costruzione di un antenna piu' performante ed usatissima nella ricezione dei satelliti polari NOAA a 137 Mhz. Jul 2, 2024 · The Quadrifilar Helix Antenna, known as QFH, is a popular antenna for ham radio hobbyists who capture weather satellite images. Dopo una breve ricerca su internet, la scelta e May 16, 2013 · Hello, I've taken it upon myself to build a QFH antenna for 435mhz to receive Amsat signals. My first try at receiving NOAA/Meteor at 137MHz. 7ghz, such as this, but I have only seen this used for HRPT reception and not sure if it would work for GOES. (2) Its radiation is just about as perfectly circularly polarized as you will ever find, in all directions Compares turnstile and QFH antennas for weather satellite reception noaa satellite signals with a pvc qfh antenna and laptop this website also link to a github where you can find files and supporting documentation for constructing a qfh antenna. us 70-cm Satellite Antenna", QST Magazine, November 2008, pg 72]. This antenna is unique in its simplicity of design and powerful performance compared with standard directional receivers. Whilst building I had trouble finding useful information on how to do it exactlyso here is my way of doing it :D The UHF Amateur Satellite Antenna, UC-4364-328 is a compact Quadrifilar Helix Antenna designed to operate through Amateur Radio satellites is available and sold at antennas. The VHF+UHF Passive Amateur Satellite QFHA Kit, UC-AMSAT-KITP-531 is a discounted pair of full-size, passive Quadrifilar Helix Antennas for Amateur Satellite. Sep 20, 2025 · This strange-looking antenna, often named the egg-beater antenna (for obvious reasons), was invented in the 1940s and has become something of a stablemate for modern satellite communications, and also other uses such as wifi. net/kf4cpj/qha/ presents specifications and construction details for making a circularly polarized NOAA weather satellite receiving antenna. However, when used on the higher Iridium frequencies the antenna works well, and he's able to decode packets with Iridium Toolkit. How to make an effective QFH (quadrifilar helix) antenna for receiving weather satellites in the 137 MHz band, using PVC pipe and co-axial cable. Sep 21, 2020 · The QFH antenna on a tripod with home made waterproof housing The location of the cabin is not great for satellite reception but we mounted the antenna anyway to try it out. It is available and sold at the antennas. 05GHz to 3. It is a simple twisted wire - there seems to be nothing to it. So I decided to build a QFH Antenna to ble able to receive NOAA APT Signals. 5 dB gain and a spheroid radiation pattern. 137 MHz Quadrifilar Helix A web page by Mr. I'm at the point (shown here in it's current state Note that a Yagi antenna will give you stronger reception compared to a turnstile, QFH or V-Dipole, but as it is a directional antenna you will need to manually point it towards the satellite as it passes over your location. One QFH antenna is for VHF band and another is UHF band quadrifilar helix antenna. 5" H, designed to operate through Amateur Radio satellites without requiring an antenna rotator. George Goodroe (K4CFP) at http://www. I ordered a SAWbird + GOES LNA, and I was thinking of using a LHCP QFH antenna designed for 1. 1 to 2. Building a QFH-Antenna and How I Did It: To receive images from NOAA satellites, I've built myself a QFH-antenna out of copper tubing. If you want to build an antenna to receive signals from a weather satellite, you will need a special kind of circular polarized antenna known as a quadrifilar helix antenna. I built it out of 1 1/4 inch PVC water pipe, and isolated aluminium fence wire, I printed a cap that also serves as stability supports now I'm going to design center supports. The goal of this product is to offer Amateurs with space or community restrictions the ability to receive 70 cm HamSat signals, and communicate through orbiting The Quadrifilar Helix Antenna (QHA) is a simple and inexpensive solution to the problem of non-geosynchronous satellite research. This antenna is configured for right-hand circular polarization. The steps below describe my implementation of Mr. Colinear or ‘white stick’ antennas are vertically polarised omnidirectional antennas. What I like best is that high gain at low angles makes up for more attenuation near the horizon and less path loss overhead makes up for lower gain. Dec 27, 2017 · The helical antenna, first proposed by Kraus in 1948, is the natural solution to circular polarized satellite communications. Aug 28, 2023 · Here are some comments from Matthew: If you want to build an antenna to receive signals from a weather satellite, you will need a special kind of circular polarized antenna known as a quadrifilar helix antenna. A video of the antenna design/assembly/test, as well as the capture of some signals received with the Apr 10, 2021 · Cómo construir paso a paso y de forma sencilla una antena QFH para recibir satélites meteorológicos (137,5 MHz). My commercial maritime WESAT system from ICS uses a very high quality crossed dipoles antenna rather than a QFH. This project details the construction of a compact, circularly polarized Quadrifilar Helix Antenna (QHA) designed for 146 MHz operation. Building circularly polarized antennas into a satellite helps minimize the effects of antenna cross-polarization losses on the ground as the satellite moves through space. In this video I'm attempting to make a fancier antenna for listening to NOAA weather satellites. 54K subscribers Subscribed Work is progressing to assess the suitability of Sirius / XM active S-Band antennas for satellite DX'ing purposes. They were both very close in performance but I found the QFH easier to build and it seemed to provide better results. Shortwave antennas tend to be bulky but at VHF frequencies the antenna sizes are pretty manageable. The performance of the antenna with respect to its beam Building a quadrifilar helix antenna (QFH) for NOAA satellite reception with an RTL-SDR Jim Haslett 2. I am using a Nooelec NESDR SMArt v4 with a QFH antenna + Broadband LNA + SDR# using 26 meters (85 feet) of RG59 cable. Aug 24, 2013 · The first post discusses antennas that are useful for NOAA satellite reception, and shows how to build a homemade turnstile and QFH antenna. The following are considered suitable choices: I've built and used both the QFH and a turnstile antenna. In this paper, a variation of QHA referred to as “self-phased QHA” with a single May 13, 2018 · Commercial QFH antennas used to be very expensive when compared to crossed dipoles. I don't see any increase in the noise floor until I turn up the gain on the rtl dongle, which I usually don't need to do. The antenna provides a dome-shaped hemispherical pattern that is suitable for operation (transmit or receive) on various amateur radio orbiting satellites without the need for a motorized tracking system. A low-cost, easy-to-build Quadrifilar Helix (QFH) antenna for weather satellite reception using uPVC plumbing pipe and RG-58U coaxial cable. Apr 1, 2014 · With a QFH antenna you can pick up weather satellite radio transmissions and convert them to images on a modern PC. us 6 days ago · A low-cost, easy-to-build Quadrifilar Helix (QFH) antenna for weather satellite reception using uPVC plumbing pipe and RG-58U coaxial cable. Yet, as a general-purpose base-station antenna, here for 2 May 16, 2010 · It had been about a year since I last looked at trying to get something better and after some research I found that an excellent antenna for picking up these signals are Quadrifilar Helix Antennas (137 MHz). Nov 22, 2022 · This article explores the history, key characteristics, and practical modeling of QFH antennas using AN-SOF, providing valuable insights for RF engineers and enthusiasts. I'm trying to receive GOES-16 satellite data using a repurposed TV-dish, but I'm not sure what kind of LNB/feedhorn/receiver I should use. He used a RTL-SDR with SDRSharp, WXtoImg, a QFH antenna and also an LNA. With its specific helical design, weather satellites are received even at a very small angle above the horizon, as well as vertically. 5 MHz band and is of quadrifilar helical design, constructed from PVC tubing and solid copper wire. In this video, we'll Jan 25, 2016 · So in my last post I was playing with my RTL-SDR with an Intel Edison. [Fjkaan’s] 2 meter quadrifilar hel… III. bzrlhyi ywptwa jlcerae hliui bbwhm eyplv sovj ivuj kqafwy fxljdjhu xcdvo wco xqsnk whsc emyy