antenna - What makes a 5/8 wavelength vertical desirable?
Dec 21, 2013 · The pattern for a 1/4λ monopole is essentially a doughnut, tasty and a pretty good pattern especially for a VHF antenna. Extending the antenna changes the current distribution. This flattens out the pattern removing power from the useless (for VHF purposes) vertical dimension and giving more horizontal gain and at a lower angle.
1/4 wave vs. 5/8 wave - RadioReference.com Forums
Aug 10, 2006 · A 5/8 wave 3dBd antenna radiates and receives more energy toward the horizon. Therefore they are best used in the flatlands and suburban areas. You would think a 5/8 wave antenna would be better because of its 3dBd gain, but …
1/4 wave, 1/2 wave, 5/8 wave, full wave? - RadioReference.com …
Jan 14, 2007 · The only full wave antenna design that I know of is a Loop. The longest fractional wave verticle that does work is a 3/4 wave but you don't see alot of them offered commercially but they are around. The hamstick people make a 3/4 for 2 meters but there is not enough difference to be gained really over a 5/8 wave.....which is the most popular ...
calculating all specifics for a 5/8 antenna
Jan 25, 2018 · The 5/8 wave antenna is a non-resonant antenna. This means that when perfectly constructed, it will have an impedance that is made up of a real part and an imaginary part. Generally the imaginary part will be capacitive and the real part will not match 50 ohms. Steps. Here are the steps that I would follow in planning a 5/8 wave antenna: 1.)
better antenna? 5/8 over 5/8 vs 1/2 wave? - RadioReference.com …
Feb 23, 2012 · Due to various equipment, I have some limitations - but I'm looking for a "best 1st try" option in getting an antenna. So here's my options: 1) 1/2 wave base loaded antenna mounted on truck roof. or 2) 5/8 over 5/8 ("no ground plane" type) mounted on back of cab; with the antenna/whip right near the roof line. This is on 460mhz and 50 watt radio.
Bought Sigma Venom 5/8 Silver Rod, Performance Review To Follow
Dec 13, 2008 · Sigma Venom 5/8 Wave Siver Rod CB Base Antenna The Sigma Venom 5/8 Wave is longer than 1/2 Wave. This means it will have improved performance on transmit and receive. Power Handling 1000watts Length 5.80m Gain 4.2db Impendance 50 Ohms Frequency 26-28Mhz SWR 1:1.3.1 Mounting Pole Bracket
What does 5/8 wave mean? Should I get a new base antenna?
Jul 6, 2019 · That means you have to provide the metal the magnet sticks to, as in that A/C, a car, whatever. Naturally, if that antenna and A/C was 40 feet higher the antenna would 'hear' more. (Don't know about moving the A/C though.) A 5/8 wave antenna -may- hear more than the 1/4 wave if it's mounted in the same place, maybe.
1/4, 1/2, 5/8 wave?? - RadioReference.com Forums
Aug 28, 2011 · And a 5/8 wave antenna is said to have about +3 dBi or +0.85 dBd of gain. This could be said to have about +3.85 dBq. You called the 5/8 wave antenna “about 3 dB of gain” and this would be correct if using dBi, but in such a case your 1/4 wave example definitely would not be unity gain, or 0 dB, on the same scale. T!
Building a 5/8 wave antenna | WorldwideDX Radio Forum
Feb 2, 2007 · A 5/8 antenna is nothing more than a main radiating element that is 5/8 of a wavelength long. Add ground radials to it and you have a 5/8 groundplane. The trick is getting the feedpoint to match with the feedline. If you want to use coax, you need the feedpoint of the antenna to be 50 or so ohms.
antenna theory - Ground-Plane radial sizing, is there such thing as …
Jul 13, 2020 · A typical 5/8 wave antenna at 150 MHz requires a ground plane at least 42” in diameter. At 450 MHz a 15” diameter ground plane is required, At 800 MHz a minimum of 8” is considered sufficient. Note that 42" is a bit more than a half-wavelength at 150-MHz, so the radius is about a quarter-wavelength, as one would expect for a ground plane ...