Narrow-band YIG filters aid wide-open receivers
Abstract
Several YIG narrow-notch band reject filters with insertion loss of 0.5 dB and VSWR of 1.5, now achievable over octave and multioctave ranges up to 18 GHz, can be cascaded to provide protection against multiple interference signals attacking a wide-open ECM receiver. Notch bandwidths of 10-20 MHz with 40 dB attenuation can be achieved over multioctaves. Careful design techniques to tradeoff passband and stopband responses led to this performance. Transmission-line structures are used that maximize resonator coupling, spacing, and RF field linearity, to provide smooth, low-pass passband response. The resonator size and ferrimagnetic material are chosen to provide the desired rejection performance with a minimum of spurious response.
- Publication:
-
Microwaves
- Pub Date:
- September 1978
- Bibcode:
- 1978MicWa..17...50K
- Keywords:
-
- Bandpass Filters;
- Bandwidth;
- Electronic Countermeasures;
- Low Pass Filters;
- Radar Reception;
- Radio Reception;
- Signal Detection;
- Yttrium-Iron Garnet;
- Continuous Radiation;
- Feedback Control;
- Frequency Response;
- Jamming;
- Microwave Frequencies;
- Radio Frequency Interference;
- Signal To Noise Ratios;
- Electronics and Electrical Engineering