A New Low Loss Rotman Lens Design for Multibeam Phased Arrays

Author

Schulwitz, Lora ; Mortazawi, Amir

Author_Institution

Dept. of Electr. Eng., Michigan Univ., Ann Arbor, MI

fYear

2006

fDate

11-16 June 2006

Firstpage

445

Lastpage

448

Abstract

The design methodology and analysis of a new low loss Rotman lens beam-forming network is presented. With the introduction of dielectric contours of varying permittivity within the lens, enhanced focusing is achieved. The varying permittivity is realized through a synthesized dielectric technique, where a periodic lattice of holes is formed within the dielectric substrate. In comparison to a conventional Rotman lens of similar shape and size, this new enhanced focused Rotman lens shows an insertion loss improvement of 1.2 to 2.0 dB. Also, the decrease in gain at the extreme scan angles is reduced from 1.5dB to 0.7dB

Keywords

antenna phased arrays; dielectric materials; lens antennas; multibeam antennas; permittivity; 1.2 to 2.0 dB; beamforming network; dielectric contours; dielectric substrate; insertion loss; low loss Rotman lens design; multibeam phased arrays; periodic lattice; Design methodology; Dielectric substrates; Insertion loss; Lattices; Lenses; Network synthesis; Optical design; Permittivity; Phased arrays; Shape; Antenna array feeds; Rotman lens; beam steering; multiple beam; phased arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2006. IEEE MTT-S International

Conference_Location

San Francisco, CA

ISSN

0149-645X

Print_ISBN

0-7803-9541-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2006.249587

Filename

4014928