CST – Computer Simulation Technology

Biconical EMC Antenna | Antenna Magus

Image of the Biconical EMC Antenna.

The EMC wire biconical antenna (also commonly known as the skeletal or phantom biconical), is the most common configuration for EMC measurements in use between 20 and 300 MHz, with either conical log spirals or LPDAs used from 200 MHz to 1 GHz.

Although the antenna performs less than optimally in the low frequency range of operation that is often claimed, it has attained universal acceptance in the EMC industry. By using a standardized design based on MIL-STD 461 (U.S. Military Standard), repeatable measurements can be ensured.

The EMC wire biconical operates like a dipole antenna, but the skeletal assembly approximates a conic surface (similar to a bicone), resulting in stable impedance over a wide frequency band. The EMC wire biconical requires a balanced feed, and a balun should be used between antenna and transmitter/receiver....

The biconical EMC antenna with typical radiation pattern shown at (a) fmin, (b) 2fmin, (c) 3fmin, (d) 5fmin and (e) 10fmin.

The antenna is vertically polarized, and - although the radiation pattern of the antenna changes significantly with frequency - remains omnidirectional and rotationally symmetric in any horizontal plane.

As shown in the figure on the right, the basic antenna (where no matching or balun is used) provides a reflection coefficient below -10dB at frequencies more than double the minimum operating frequency typically quoted for EMC applications.

Typical reflection coefficient versus frequency with no matching or balun included in a 150 Ohms system.

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.