Welcome to WIFI Antennas

Register now to gain access to all of our features. Once registered and logged in, you will be able to contribute to this site by submitting your own content or replying to existing content. You'll be able to customize your profile, receive reputation points as a reward for submitting content, while also communicating with other members via your own private inbox, plus much more! This message will be removed once you have signed in.

Sign in to follow this  
Followers 0
Admin

Parabeam Antenna

 

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.

screenshot_2611.jpg

screenshot_2613.jpg

screenshot_2615.jpg

Share this post


Link to post
Share on other sites

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

 

58 (1).jpg

Untitled_0_01 (1).jpg

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0