Panel Antenna is our commonly used short-wave antenna, which has the advantages of simple erection, high efficiency and simple structure. But it is unclear how the Panel Antenna will be used.

If the Panel Antenna is too long, the main lobe will gradually split into chrysanthemum shape, and the side lobe will increase, without controllable communication directivity. Therefore, great loss of transmission energy is caused, multi-polarization and multi-direction reception, signal-to-noise ratio decreases. So it's not that longer longwrie antennas are better (they need to be set up under certain conditions).

Panel Antenna can also be made into multi-band, this is the multi-band Panel Antenna, and a 1:5 balanced/unbalanced converter needs to be added in the center. It is worth noting that the Panel Antenna may have a high voltage, so the transmitter must be grounded, and the antenna elements must also be placed out of reach to prevent electric shock. As long as the vibrator is long enough, it can cover every frequency band. A single-stage antenna has only one oscillator. If used as a multi-band antenna, you need to use an antenna tuner to suit different frequency bands.

In fact, the short wave antenna is not mysterious, as long as the adjustment is good, can work well. For example, the self-made "W" antenna is the transformation of the inverted "V" antenna, the effect is very satisfactory. So, as long as you master the principle, use your mind, use your imagination, you can also design an excellent short-wave antenna!

Panel Antenna https://www.cenrf.com/MIMO-4x4-Panel-Antenna-698-4000MHz-N-Female.html