A useful way to introduce a bistatic radar is to define it, outline its operation, and summarize its utility. The basic definition is straightforward: a radar operating with separated transmitting and receiving antennas. How far the antennas are separated is sometimes included in the definition and can be ambiguous. Variations of a bistatic radar have been developed, the most significant of which is the multistatic radar. In its basic form, a multistatic radar uses two or more separated receiving antennas operating with a single transmitting antenna. These topics are discussed in Section 1.2. While most of the material in this book is about bistatic radars, multistatic radars can be considered extensions of bistatic radar and are treated as such, usually in special sections and in one case as a separate chapter of the book (Chapter 11).
The basic requirements for bistatic radar operation are outlined in Section 1.3. A convenient approach is to relate bistatic radar requirements to those of monostatic radar (collocated transmitting and receiving antennas) because most readers are familiar with the ubiquitous monostatic radar. In fact, bistatic and monostatic radar requirements, operation, and performance are compared throughout the book to provide a sense of continuity between the two types of radars. This comparison also provides a "sanity check" for ail bistatic radar equations because in the limit a bistatic equation must collapse to the monostatic equation.
The utility of bistatic radars is summarized in Section 1.4. Nearly 200 bistatic radars were built and deployed for...
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