Dispersive delay at gigahertz frequencies using magnetostatic waves
Abstract
Magnetostatic waves are intrinsically suited for use in microwave dispersive delay lines, because they are readily generated at high frequencies and their velocity is frequency dependent. Here we review progress toward meeting the systems requirement that the delay time be linear in frequency. Magnetostatic waves can approach this condition if a ground plane is nearby or if two or more ferrite layers are present; with forward volume waves one may also use a dispersive reflecting array, as is done with surface acoustic waves. The use of a properly shaped ground plane gives the lowest phase errors so far measured (±16° over 0.6 GHz); multiple ferrite layers show promise of allowing the greatest delay.
- Publication:
-
Circuits Systems and Signal Processing
- Pub Date:
- March 1985
- DOI:
- 10.1007/BF01600076
- Bibcode:
- 1985CSSP....4..115D
- Keywords:
-
- Antenna Arrays;
- Delay Lines;
- Magnetostatics;
- Microwave Circuits;
- Phased Arrays;
- Wave Propagation;
- Backward Waves;
- Film Thickness;
- Magnetic Dispersion;
- Ohmic Dissipation;
- Surface Waves;
- Yttrium-Iron Garnet;
- Electronics and Electrical Engineering;
- Microwave;
- Ferrite;
- Delay Time;
- Acoustic Wave;
- Surface Acoustic Wave