1. J. A. Scheer and J. L. Kurtz, Coherent Radar Performance Estimation, Artech House, Boston; London (1993).
2. P. Penfield, Jr. and R. F. Rafuse, Varactor Applications, MIT Press, Cambridge (1962).
3. A. I. Grayzel, IEEE Trans., CT13, 52–58 (1966).
4. A. I. Grayzel, IEEE Trans., MTT14, 239–242 (1966).
5. J. O. Scanlan and P. J. R. Laybourn, Proc. Inst. Elec. Eng., 112, No. 8, 1515–1522 (1965).