Planar amplifier array with improved bandwidth using folded-slots

Author

Tsai, H.S. ; Rodwell, M.J.W. ; York, R.A.

Author_Institution

Dept. of Electr. Eng., California Univ., Santa Barbara, CA, USA

Volume

4

Issue

4

fYear

1994

fDate

4/1/1994 12:00:00 AM

Firstpage

112

Lastpage

114

Abstract

Active antennas on semiconductor substrates often suffer limited bandwidth. We report on a relatively broadband quasi-optical amplifier cell and 4/spl times/4 array using folded-slot antennas, suitable for monolithic power combining. Two orthogonally polarized CPW-fed folded slots are coupled to the input and output ports of a simple resistive feedback MESFET amplifier. The peak effective isotropic power gain in the transmission mode is 11 dB @ 4.3 GHz with 10% bandwidth for the single cell, a factor-of-ten improvement in bandwidth over a similar amplifier cell using patch antennas, and 32 dB @ 4.24 GHz with 8% bandwidth for the array.<>

Keywords

Schottky gate field effect transistors; active antennas; feedback; microwave amplifiers; microwave antenna arrays; microwave integrated circuits; slot antennas; 11 to 32 dB; 4.24 to 4.3 GHz; MIC; SHF; active antennas; bandwidth improvement; broadband; folded slots; monolithic power combining; planar amplifier array; polarized CPW-fed slots; quasi-optical amplifier cell; resistive feedback MESFET amplifier; slot antennas; Antenna arrays; Bandwidth; Broadband amplifiers; Broadband antennas; Couplings; MESFETs; Output feedback; Polarization; Power amplifiers; Substrates;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.282576

Filename

282576