Transceiver Duplexer Design Considerations

The transceiver duplexer is a key element in avionics systems, radars, antenna arrays and wireless communication systems. The duplexer provides protection of the receiver and transmitter from unwanted parasitic signals. This article discusses several duplexer schematics, their development flow and a trade-off design. Duplexer Schematics An RF transceiver duplexer...
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An Aircraft Single-antenna FM Radio Altimeter

Advantages of a frequency modulated single-antenna radio altimeter, including lower cost and weight, improved accuracy and higher altitude range
As is well known, there are two general types of altimeter systems - a pulse radar altimeter and a frequency modulated, continuous wave (FM-CW) radio altimeter. Aircraft radio altimeters typically operate at altitudes from 0 to 8000 feet utilizing separate antennas for transmit and receive. Such radio altimeters have...
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Reviewing the Basics of Suspended Striplines

Suspended striplines are widely used for several reasons. They provide high Q-factor, wide bandwidth and good temperature stability. This tutorial reviews some of the basic principles and new concepts for suspended striplines.
There are several reasons for the wide use of printed transmission lines. They are simple to produce, they operate over a wide bandwidth, and have small weight and dimensions. The earliest form of printed transmission lines was the stripline ( Figure 1a ). 1,2 The printed stripline consists of...
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