What is 4nec2?
4nec2 is a completely free Nec2, Nec4 and windows based tool for creating, viewing, optimizing and checking 2D and 3D style antenna geometry structures and generate, display and/or compare near/far-field radiation patterns for both the starting and experienced antenna modeler.
How do I aim a Yagi antenna?
A Yagi antenna should also be pointed so that the largest fins are closest to the mast and the shortest fins pointed at each other. For Omni directional antennas, they should be in most cases pointed directly vertical. That is to say, pointed directly up into the sky.
How is Yagi gain calculated?
The antenna gain is a function of the number of dipole elements : GT = 1.66 * N where N is the number of elements in the Yagi antenna.
Is Eznec free?
EZNEC 7.0 is now a free download.
What is Mininec?
MININEC Pro is an antenna analysis program for Windows and Macintosh computers. Any type of antenna may be analyzed. The physical design of the antenna is entered (such as the lengths of wires and elements). For a given frequency, the feedpoint impedance is calculated, along with theoretical efficiency.
What is the desired bandwidth of a log-periodic antenna operating from 30 MHz 90?
The frequency range, in which the log-periodic antennas operate is around 30 MHz to 3GHz which belong to the VHF and UHF bands.
What is front-to-back ratio on a Yagi antenna?
Yagi Front to Back ratio One of the figures associated with the Yagi antenna gain is what is termed the front to back ratio, F/B. This is simply a ratio of the signal level in the forward direction to the reverse direction. This is normally expressed in dB.
How do you calculate transmission power?
- Pt = Transmitted Power.
- PC = Carrier Power.
- Pt = It2 R (Transmitted Power)
- PC = IC2 R (Carrier Power)
- It = RMS value of the antenna current after modulation.
- IC = RMS value of the antenna current before modulation.