MIC frequency discriminators for K-Ka band IFM receivers

Instantaneous Frequency Measurement (IFM) receivers employing balanced stripline microwave circuits have become well established for frequencies up to 18 GHz, and it is now possible to obtain Microwave Integrated Circuit (MIC) designs with superior performance. A description is presented of the design of an MIC-on-alumina frequency discriminator which may be employed in a K-Ka band digital IFM receiver. Attention is given to the block diagram of a typical digital IFM receiver, basic information regarding the frequency discriminator theory, and the results obtained with a frequency discriminator having a nominal differential delay length of 45 mm.