Title :
An MMIC vector modulator for a crossbar BFN
Author :
Grajal, Jesús ; Gismero, Javier ; Mahfoudi, Mustafá ; Bustama, Luis
Author_Institution :
Microwave and Radar Group. Polytechnical, University of Madrid, E.T.S.I. Telecomunicación, Ciudad Universitaria S/N 28040, Madrid, Spain. Phone: 34- 1 -3367358, Fax: 34-1- 3367362, e-mail: jesus@gmr.ssr.upm.es
Abstract :
A 1.4-2.7 GHz monolithic vector modulator with continuous amplitude and phase control has been developed. Each state within a full 3600 phase range and a dynamic range greater than 13 dB is generated by combining two from among three vectors with variable amplitude and 120° apart. The control in amplitude for the three vectors is performed by sets of two MESFETs working as dual-gate MESFETs and the phase shift of 120° for these vectors is obtained through LC filters over the 1.4-2.7 GHz band. The circuit will be used as the control node in a Crossbar Beam Forming Network (CBFN).
Keywords :
Array signal processing; Band pass filters; Circuits; Dynamic range; Impedance; MESFETs; MMICs; Phase control; Power transmission lines; Transconductance;
Conference_Titel :
Microwave Conference, 1996. 26th European
Conference_Location :
Prague, Czech Republic
DOI :
10.1109/EUMA.1996.337738
