CST – Computer Simulation Technology

Pin-fed Single Choke Horn Antenna | Antenna Magus

Image of the Pin-fed single choke horn antenna.

The pin-fed single choke horn antenna is a slight variation on the pin-fed circular waveguide antenna (Cantenna) already released in Antenna Magus 2.1. A single quarter-wavelength choke is introduced at the open end of the waveguide which will not only increase the gain, but will also decrease the side- and backlobes. A backlobe level reduction of more than 15 dB has been seen through the addition of a single choke.

The circular waveguide is designed to operate between the fundamental TE11 and next TM01 propagating circular waveguide mode. The feed-pin excites the TE11 mode, forming a coaxial-to-circular-waveguide transition. The distance from the waveguide back wall is used to control the input impedance.

The addition of a single quarter-wavelength choke at the open end of the waveguide supresses the current distribution on the outside of the circular waveguide walls which reduces the front/back ratio, sidelobes and improves the axial symmetry of the radiation pattern....

The design below is for 50 Ohm. A comparison between this device and the Cantenna shows the significant reducing in front/back ratio by the addition of this basic choke.

Typical reflection coefficient versus frequency
Typical total gain radiation pattern at the center frequency
Gain pattern comparison between the antenna designed here and the Cantenna

Rate this Article

0 of 5 Stars
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
contact support

Your session has expired. Redirecting you to the login page...

We use cookie to operate this website, improve its usability, personalize your experience, and track visits. By continuing to use this site, you are consenting to use of cookies. You have the possibility to manage the parameters and choose whether to accept certain cookies while on the site. For more information, please read our updated privacy policy

Cookie Management

When you browse our website, cookies are enabled by default and data may be read or stored locally on your device. You can set your preferences below:

Functional cookies

These cookies enable additional functionality like saving preferences, allowing social interactions and analyzing usage for site optimization.

Advertising cookies

These cookies enable us and third parties to serve ads that are relevant to your interests.