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- Network of suspended horizontal wires or cablesIn electronics and radio communication, a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth (ground) connection in a radio antenna system.
en.wikipedia.org/wiki/Counterpoise_(ground_system) - People also ask
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See all on WikipediaIn electronics and radio communication, a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth (ground) connection in a radio antenna system. It is used with radio transmitters or receivers when a normal earth ground cannot be used … See more
Counterpoises are typically used in antenna systems for radio transmitters where a good earth ground connection cannot be constructed.
Monopole antennas used at low frequencies, below … See moreThe size of the counterpoise used for radio work depends on the wavelength of the transmit frequency. With a monopole antenna, the counterpoise functions as a ground plane, reflecting the radio waves radiated downward by the antenna. To perform … See more
The largest use of counterpoises is in transmitters on the low frequency (LF) and very low frequency (VLF) bands, as they are very sensitive to ground resistance. Because of the large wavelength of the radio waves, feasible antennas used at these frequencies are See more
• Capacitance hat — the elevated counterpart of a ground system
• Monopole antenna
• Tesla coil See moreWikipedia text under CC-BY-SA license WEBantenna and counterpoise basics • r.f. transmission/antenna systems have similar qualities to complete proper a.c. & d.c. supply/load circuits. • kirchoff’s law dictates that …
WEBSince you are attempting to increase the efficiency of your antenna, a good goal is to keep the total AC resistance of your counterpoise to less than 1% of the ideal feed point …
WEBA counterpoise is simply a long, insulated wire that attaches to the ground connection on your antenna tuner. The best counterpoise is 1/4-wavelength at the lowest frequency you intend to use. That’s a lot of …
About Counterpoise – MyAntennas.com
WEBThe ARRL Handbook (Straw 2003) defines counterpoise as: “A wire or group of wires mounted close to the ground, but insulated from the ground, to form a low impedance, …
Counterpoise Systems
WEBA grid of conductors parallel to a dipole, laid on earth or suspended above earth, is often referred to as a counterpoise. After all, the word "radial" hardly fits a group of parallel wires with no real connection to …
Antenna Counterpoise - Ham Radio . Magnum Experimentum
WEB2.86 counterpoise. A system of conductors, elevated above and insulated from the ground, forming a lower system of conductors of an antenna. NOTE—The purpose of a …
WEBMay 14, 2022 · For me this comes to a fine point in the "random wire" and also "end-fed half-wave" antenna guidance. These antennas — at least supposedly — involve …
WEBThe ARRL Handbook (Straw 2003) defines counterpoise as A wire or group of wires mounted close to ground, but insulated from ground, to form a low impedance, high …
WEBcounterpoise, in electronics, portion of an antenna system that is composed of wires or other types of conductor arranged in a circular pattern at the base of the antenna at a …
WEBGround systems with λ/4 radials were rarely practical but very early it was recognized that an elevated system called a "counterpoise" or "capacitive ground", with dimensions …
Improve Your HT Ham Radio By Adding A Counterpoise Antenna …
WEBFeb 8, 2014 · You would construct a counterpoise antenna wire 11.5 inch for VHF, 6.5 for UHF and about 19.5 inches for an OK performing dual band VHF/UHF radio. Normally …
hf - What lengths of counterpoise is suitable to support a 58 foot ...
WEBJun 29, 2022 · But in many ways that is all a counterpoise is: something for the rest of the antenna to work against, because if we don't, that antenna will find a counterpoise …
End-Fed Halfwave Antenna, Do they need a counterpoise, or not?
WEBIt’s a random and uncontrolled counterpoise: It’s the outside of your coax shield. If you’re lucky your coax feedline is the correct length to act as the counterpoise for that band. If …
What on Earth is a counterpoise? - Simple Ham Radio Antennas
WEBJan 25, 2022 · If you use 1/4 wavelength vertical antennas, you probably recognize the necessity of having a good ground radial or counterpoise system. In this video, Dave …
What is counterpoise? - Electrical Engineering Stack Exchange
WEB3 Answers. Sorted by: A grounded surface forces the potential to be zero everywhere on this surface and has the same effect as if the antenna arrangement were mirrored on …
WEBIt does not require an extensive ground like a big ferrous vehicle body, only a short counterpoise wire. It is a favorite of Summits-On-The-Air (SOTA) activators and …
Does a 1/2 wavelength end-fed antenna need a good RF ground?
WEBJan 24, 2019 · 7 Answers. Sorted by: 4. No, it is not needed, but it can improve the antenna system. An EFHW is simply a half-wave length of wire and a matching device, and …
"Do I need a counterpoise for my EFHW? - Radio-Stuff
WEBAug 6, 2022 · Our antennas are broad band transformers (multi-band EFHW) and they use the coax as a counterpoise for the antenna. In the image below you will see there is no …
9:1 UnUn / BaLun Antenna and Counterpoise for Ham Radio
WEBJul 23, 2021 · 655. 22K views 2 years ago Learn about Chokes, Baluns and UnUns for Ham Radio Antennas. In this video, we discuss 9:1 End Fed Random Wire Antennas and the …
Verticals - ARRL
WEBVerticals. T he vertical is a popular antenna among hams who lack the space for a beam or long wire antennas. In an electrical sense, a vertical is a dipole with half of its length …
What balance (radials or counterpoise) do I need for a vertical ...
WEBOct 6, 2022 · A counterpoise is always 1/4 wave length, and you can set-up a pair for each band you have without needing to disconnect any of them between switching …
What is Counterpoise in an Antenna System? - YouTube
WEBMar 24, 2023 · Web: https://johnsonfrancis.org/techworld/what-is-counterpoise-in-an-antenna-system/ What is Counterpoise in an Antenna System?
RF from EFRW antenna. What am I doing wrong : r/amateurradio …
WEBThe antenna is a sloper, going from one of the bedrooms to the fence post so counterpoise just hangs at about 45degrees relative to antenna without touching the …
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