What is the gain of a 1/4 wave vertical antenna?
What is the gain of a 1/4 wave vertical antenna?
A 1/4 wave vertical ground mounted has lobes from 10 to 55 degrees and has gain of approximately 3 to 10 dBd.
Do I need a balun on my vertical antenna?
No you shouldn’t need a balun. A balun is to match a balanced antenna to an unbalanced feedline. Your vertical is probablu an unbalanced antenna, so no need. A balanced antenna would be something like a centre fed dipole, so you’d use a balun for it.
What is the impedance of a vertical antenna?
The typical resonant feed point impedance of a 1/2 wavelength antenna (with a reasonable ground system of at least 1 raised radials or 2 radials at ground) is 2,000-4,000 ohms and can be impedance matched with an LC circuit or high ratio impedance matcher such as the Bullet-64 or 64:1 unun which matches 3200 ohms to 50 …
Does a half wave vertical antenna need a ground plane?
Does a 1/2 wave antenna need a ground plane? Answer: No. It does not require a ground plane to work efficiently. In fact it is best to install the 1/2 wave antenna at least 8 inches from any nearby metal objects for better performance.
What is a quarter wave stub used for?
The Quarter-wave stub can be used for many purposes. If it is left with an open end it can be used as a notch filter to attenuate certain frequencies. A quarter wave length of a transmission line can also be used as an impedance transformer, to know more about the Quarter-wave impedance transformer, click here.
What is the length of a quarter wave antenna?
A quarter-wavelength antenna is easy and inexpensive to build and can be an effective antenna with a low angle of radiation (that is, power is radiated out, not up). The formula for calculating the approximate length of a quarter-wave vertical antenna is: Quarter-wavelength in feet: 234 / frequency in MHz
How to make a 1/4 wave stub at 14 MHz?
If our goal is to make a 1/4 wave stub at 14 MHz we simply take out our coax cutters and snip off portions to raise the 10.9 MHz to 14 MHz. After each snip, adjust the frequency up and down to find the new zero impedance point. It’s that simple.
What are the applications of a quarter wave length transmission line?
If it is left with an open end it can be used as a notch filter to attenuate certain frequencies. A quarter wave length of a transmission line can also be used as an impedance transformer, to know more about the Quarter-wave impedance transformer, click here. The bandwidth of a quarter-wave notch filter is about 20 % (i.e.
