A 0.7-3 GHZ GAAS QPSK QAM DIRECT MODULATOR

被引：27

作者：

BOVEDA, A ^{[1
]}

ORTIGOSO, F ^{[1
]}

ALONSO, JI ^{[1
]}

机构：

[1] UNIV POLITECN MADRID,ESCUELA TECN SUPER INGN TELECOMUN,MADRID,SPAIN

来源：

IEEE JOURNAL OF SOLID-STATE CIRCUITS | 1993年 / 28卷 / 12期

关键词：

Heterodyning - Microprocessor chips - Microwave devices - Solid state devices;

D O I：

10.1109/4.262008

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A single chip I/Q direct modulator for use in digital radio links is presented. This device translates directly the phase and quadrature baseband signals to a microwave frequency that can be chosen between 700 MHz and 3 GHz avoiding the use of IF circuits. It is able to generate any type of digital modulation as QPSK, n-PSK, n-QAM, GMSK, etc., with band-limited spectrum. The bandwidth of the I/Q modulating signals is more than 500 MHz allowing the use of the circuit even in the highest capacity systems. The device has 120 components in a 2.2 x 2.4 mm chip and has been fabricated using 0.5 mum GaAs MESFET process.

引用

页码：1340 / 1349

页数：10

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