A 1.4-2.7-GHz analog MMIC vector modulator for a crossbar beamforming network

Author

Grajal, Jesús ; Gismero, Javier ; Mahfoudi, Mustapha ; Petz, Felix A.

Author_Institution

ETSI Telecomunicacion, Univ. Politecnica de Madrid, Spain

Volume

45

Issue

10

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

1705

Lastpage

1714

Abstract

The design and performance of a monolithic 1.4-2.7-GHz vector modulator with analog amplitude and phase control are presented in this paper. A full 360° coverage range and a dynamic range greater than 13 dB is achieved by combining two out of three vectors 120° apart with variable amplitude. Amplitude control is performed by three sets of quasi-dual-gate MESFETs (two single-gate MESFETs in cascade) while the 120° shift among the vectors is achieved through LC filters covering the 1.4-2.7-GHz band. Since the active devices throughout the circuit are not working in saturation, large-signal models must be used in the simulations. The circuit is used as the matrix node element in an analog crossbar beamforming network (CBFN) and as the general-purpose wide-band vector modulator device

Keywords

MMIC; active antenna arrays; analogue integrated circuits; antenna phased arrays; array signal processing; microwave antenna arrays; modulators; 1.4 to 2.7 GHz; LC filter; active device; amplitude control; analog MMIC vector modulator; coverage range; crossbar beamforming network; dynamic range; large-signal model; matrix node element; monolithic circuit; phase control; quasi-dual-gate MESFET; simulation; Amplitude modulation; Array signal processing; Circuit simulation; Dynamic range; Filters; MESFETs; MMICs; Phase control; Phase modulation; Wideband;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.641716

Filename

641716