Parabeam Antenna

[Admin 2545]

 

A broadband antenna is a must for 2350-2550MHz. The main problem of most antennas (as well as the matching system) for this band is the ability to achieve a low VSWR over a wide bandwidth while maintaining a high gain. This limits most antennas to a bandwidth of 100 or 200 MHz. By using quagi dimensions for directors and all spacings, the bandwidth of the driven element can be widened to 200 MHz by changing the driven element and the reflector to the double quad design, then bending them at a 11 degree angle. When this is done, all three radiating elements on the driven element reinforce each other at the first director for added gain on both receive and transmit.

 

In an antenna system with two quad loops driven at the center, there is an impedance of approximately 75 ohms. When used in an array , this can drop to around 50 ohms , which can be driven with 50 ohm coax directly without any matching device. This helps with the simplicity of the easy-to-build broadband design.

[Admin 2545]

And they represent two panel antenna(2x2-4x4)

 

[Admin 2545]

Yagi Parabeam

 

[pragata.my.id 25]

datasheet, please..