MIC 7-TO-11-GHz Frequency Discriminator.
Abstract
A broadband (7 to 11 GHz) frequency discriminator was developed that is highly linear and suitable for either CW or pulse RF input signals. Microwave integrated circuit (MIC) techniques were used in the construction of the discriminator. Microstrip is chosen for the RF circuits to minimize the discriminator's size and, eventually, cost of production. The discriminator is of the conventional line discriminator type and consists of two 3-dB quadrature hybrids, a delay line, and two detectors. The difference between the two detector outputs is the desired output voltage, which is close to a linear function of the incoming signal. Interaction between imperfect subcomponents and higher harmonics that are generated in the detector diodes causes undesirable ripples in the frequency-response characteristic. A computer analysis program was written to determine error sources and to develop subcomponent specifications that must be maintained to obtain a given linearity specification. The development of high-performance microstrip quadrature hybrids, 3-dB attenuators, terminations, and detectors is described.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1976
- Accession Number
- ADA034977
Entities
People
- John P. Watjen
- Ulrich H. Gysel
Organizations
- SRI International