The design and measured results of a single-substrate transceiver module suitable for 76-77-GHz pulsed-Doppler radar applications are presented. Emphasis on ease of manufacture and cost reduction of commercial millimeter-wave systems is employed throughout as a design parameter. The importance of using predictive modeling techniques in understanding the robustness of the circuit design is stressed. Manufacturing techniques that conform to standard high-volume assembly constraints have been used. The packaged transceiver module, including three waveguide ports and intermediate-frequency output, measures 20 mm 22 mm 8 mm. The circuit is implemented using discrete GaAs/AlGaAs pseudomorphic high electron mobility transistors (pHEMTs), GaAs Schottky diodes, and varactor diodes, as well as GaAs p-i-n and pHEMT monolithic microwave integrated circuits mounted on a low-cost 127-m-thick glass substrate. A novel microstrip-to-waveguide transition is described to transform the planar microstrip signal into the waveguide launch. The module is integrated with a quasi-optical antenna. The measured performance of both the component parts and the complete radar transceiver module is described.
&--Thi s paper reports on the basic theory of operation and experimental results obtained from an electric field imaging wave circuits that employs the method with rnonolithically integrated probes. capable of mapping the normal and eld intensities and electrical phase delays icrowave circuits in the frequency range of spatial electric field resolution of better than probes incorporating silicon Schottky diodes integrated with electrically small dipole and monopole antenna scatterers on a 40-pm-thick high-resistivity silicon substrate are used. Electric field intensity and electrical phase delay images tenna at 12-85 GNz. The results demonstrate
A single-substrate radar transceiver module suitable for 76-77GHz pulsed-Doppler applications has been developed. The packaged transceiver, including three waveguide ports and IF output, measures 20 x 22 x 8". The circuit is realized using discrete GaAdAIGaAs pHEMTs, GaAs Schottky diodes and varactor diodes, as well as GaAs PIN and PHEMT MMICs mounted on a low-cost 127pm thick glass substrate.
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