BARNARD MICROSYSTEMS LIMITED
helping you keep an eye on things...
Radio Direction Finding is used:
- to locate a radio transmitter, using “triangulation”, from dma1418b1_pds_01a.jpg www.rdfproducts.com and RDF autodem.gif.
- to locate the source of interference signals, for example, from the ignition system of a petrol (gasoline) engine, or from the brushes in an electric motor
- as a navigation aid, using the known location of radio and/or cell phone antennas.
Radio Direction Finding
A Radio Direction Finding (RDF) system, consists of several antennae connected to a signal processing unit and is used to find the bearing (angle) to a radio transmitter.
Example of a Radio Direction Finding device with multiple antennas.
From dma1418b1_pds_01a.jpg www.rdfproducts.com.
|
Bearing Errors – Standard Reflection Field |
|||
|
Antenna type |
Operation details |
Peak error |
RMS error |
|
Two-spaced |
Adcock Time Of Arrival |
11.4° |
8.0° |
|
One-quarter size Doppler |
4 arms |
8.0° |
5.4° |
|
One-half size Doppler |
8 arms |
5.2° |
2.8° |
|
Full size Doppler |
16 arms |
3.4° |
1.5° |
|
Example of RDF antenna seen at the Dubai Air Show 2007 at the Thales outdoor stand |
© Barnard Microsystems Limited 2006 - 2008