The analysis of linear phase arrays based on the slitted asymmetric ridge waveguide: a structure that is, at the same time, easy to manufacture and very flexible in terms of electrical characteristics is presented. Scanning is obtained in leaky-wave fashion (frequency scan) in elevation (longitudinal plane), and by phase shifters in azimuth (cross-plane). The analysis is based on the development of an accurate transverse equivalent network and on the derivation of a dispersion relation which gives the complex longitudinal propagation constant in terms of the structural parameters. Both cases of air-filled and dielectric-loaded ridge waveguide are studied. The effects of mutual coupling between the various line sources of the array are taken into account using the unit-cell approach. A detailed parametric analysis is carried out showing how the real and imaginary parts of the complex propagation constant, which are related to the radiation characteristics, can be controlled with a good degree of independence from each other. Moreover, no blind spots are introduced in the scanning process. While the grating lobes an avoided, due to the choice of the cross-section. This approach has been applied to two other linear phased arrays of leaky-wave line sources, based on an asymmetric NRD guide and on a printed-circuit version of an offset groove guide.
Linear phased arrays based on slitted asymmetric ridge waveguides / Frezza, Fabrizio; M., Guglielmi; Lampariello, Paolo. - In: IEE PROCEEDINGS. MICROWAVES, ANTENNAS AND PROPAGATION. - ISSN 1350-2417. - 142(1995), pp. 47-51.
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|Titolo:||Linear phased arrays based on slitted asymmetric ridge waveguides|
|Data di pubblicazione:||1995|
|Citazione:||Linear phased arrays based on slitted asymmetric ridge waveguides / Frezza, Fabrizio; M., Guglielmi; Lampariello, Paolo. - In: IEE PROCEEDINGS. MICROWAVES, ANTENNAS AND PROPAGATION. - ISSN 1350-2417. - 142(1995), pp. 47-51.|
|Appartiene alla tipologia:||01a Articolo in rivista|