Millimetric-wave antennas and devices: Review
Abstract
Millimetric waves are eminently suitable for many applications in the national defense and in the national economy, ranging from detection of low-flying objects to meteorological, geological, and medical research. They occupy a unique position in the electromagnetic spectrum, namely between optical waves and radio waves. Most important and interesting among millimetric-wave devices are waveguides, antennas, and antenna auxiliaries. Waveguides are essentially the same as those used for other wave bands, however here there is a choice available between optical or radio-technical methods of energy channeling. Waveguides or transmission lines which have been and are being developed include rectangular and circular single-mode and multimode metal ones, helical ones, metal-dielectric ones, solid and hollow cylindrical dielectric ones, Y-dielectric ones, microstrip lines, dielectric image lines, dielectric strip in substrate, dielectric strip on substrate, grooved open ones and slotted closed ones. Millimetric-wave antennas, on the other hand, require special manufacturing precision on account of critical lossiness and narrow transparence windows in the Earth's atmosphere.
- Publication:
-
USSR Rept Electron Elec Eng JPRS UEE
- Pub Date:
- September 1985
- Bibcode:
- 1985RpEEE.......35V
- Keywords:
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- Antenna Radiation Patterns;
- Millimeter Waves;
- Wave Propagation;
- Waveguide Antennas;
- Antenna Components;
- Antenna Design;
- Dielectric Properties;
- Microstrip Transmission Lines;
- Communications and Radar