Integrated Balanced BPSK and QPSK Modulators for the Ka-Band
- 1 January 1982
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 30 (3), 227-234
- https://doi.org/10.1109/tmtt.1982.1131056
Abstract
Microwave integrated circuit (MIC) balanced biphase-shift-keying (BPSK) and quadri-phase-shift-keying (QPSK) modulators have been achieved in the 27-GHz band. The modulators are fabricated using a combination of microstrip lines and slot lines, viz., tow-sided MIC. The diodes used are beam-lean Schottky-barrier diodes. Balanced BPSK modulation is performed by path-switching and mode transformation from the slot line to microstrip lines. The insertion loss is 2.2 dB at a carrier frequency of 27 GHz. The phase error and the amplitude deviation are less than 1° and 0.5 dB, respectively. The QPSK modulator consists of two BPSK modulators, a power divider, and a branch-line hybrid coupler. The configuration of the modulator is the parallel-connected type. The insertion loss is 6.3 dB at a carrier frequency of 27 GHz. The phase error is less than 2°, and the rise time and fall time of the modulated earner are less than 300 ps. The isolation between the carrier input port and the QPSK modulated earner output port is greater than 25 dB. These modulators can be extended to the millimeter-wave band.Keywords
This publication has 14 references indexed in Scilit:
- PSK and QPSK Modulators for Gigabit Data RatesPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- A Fast-Switching Low-Loss 12-GHz Microstrip 4-PSK Path Length ModulatorIEEE Transactions on Communications, 1980
- A Ku-Band Hybrid-Coupled 4-Phase Modulator in M.I.C. TechnologyPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1975
- High Data-Rate Solid-State Millimeter-Wave Transmitter ModuleIEEE Transactions on Microwave Theory and Techniques, 1975
- 400-Mb/s QPSK Repeater for 20-GHz Digital Radio-Relay SystemIEEE Transactions on Microwave Theory and Techniques, 1975
- K-band integrated microstrip modulator and mixer in waveguide for a high-speed PCM radio repeaterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1972
- An experimental MM-wave high-speed path-length modulatorPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1970
- Quality factor of switching diodes for digital modulationProceedings of the IEEE, 1970
- Strip-Line High-Speed Switches and Modulators in the 4-GHz RegionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1969
- The Design of Ridged WaveguidesIEEE Transactions on Microwave Theory and Techniques, 1955