Abstract
Indirect holographic techniques offer the potential of using simple and inexpensive near-field intensity-pattern measurements for the determination of the radiation characteristics of microwave antennas, and for the reconstruction of complex aperture fields. This work describes a practical method of applying indirect holographic techniques to microwave antennas. It describes how a technique originally developed at optical frequencies can be adapted to enable measurements to be taken on microwave antennas. The major difference is the replacement of a radiated reference signal by an electronically generated reference signal. This has enabled previous practical limitations to be overcome. Computer simulations and practical results are included for a large dish antenna at a sample spacing similar to those employed in direct holographic techniques. This work also describes how reducing the sample spacing significantly below a half wavelength enables the radiation characteristics of smaller antennas to be determined.
| Original language | English |
|---|---|
| Pages (from-to) | 54-67 |
| Number of pages | 14 |
| Journal | IEEE Antennas and Propagation Magazine |
| Volume | 49 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Feb 2007 |
| Externally published | Yes |
Keywords
- Antenna measurements
- Antenna radiation patterns
- Holographic recording
- Holography
- Image reconstruction
- Microwave antennas
- Microwave holography
- Microwave imaging