Well-Defined Contacts Produce Accurate Spreading Resistance Measurements
Abstract
It is demonstrated that two microstrip arrays can be superimposed in a common planar aperture to create a dual-band array. The concept relies critically on the invisibility of the uppermost array, which is constructed from a frequency-selective conducting surface (FSCS). Analysis and measurements establish the degree of invisibility obtainable in an FSCS of finite extent and indicate the likely behavior in a composite system. Measurements for a dual-band array illustrate the findings and good future prospects for the concept, but also show that feeder line radiation, if not reduced, can constrain sidelobe levels.
- Publication:
-
Electronics Letters
- Pub Date:
- September 1986
- DOI:
- 10.1149/1.2100306
- Bibcode:
- 1986ElL....22.1040J
- Keywords:
-
- Antenna Arrays;
- Antenna Radiation Patterns;
- Dichroism;
- Microstrip Antennas;
- Antenna Feeds;
- Bandwidth;
- Cross Polarization;
- Dielectrics;
- Electronics and Electrical Engineering