Abstract
A novel, 900-MHz SAW (surface acoustic wave) microstrip antenna-duplexer designed for use in European mobile radio systems is presented. The duplexer consists of a transmitter SAW filter, two receiver SAW filters, a low-noise receiver amplifier, and a duplexing microstrip circuit. A dual-track filter design using interdigital transducers for track coupling provides low insertion loss (5 dB), small passband ripple (±0.5 dB), high stopband rejection (50 dB), and small chip-size (TO-39 package). The filters were fabricated on 36°-rotated YX-LiTaO3 substrates with a photolithographic technique. Due to the design of the microstrip duplexer, the selectivity of the front end is enhanced by 15 dB.
| Original language | English |
|---|---|
| Pages (from-to) | 729-732 |
| Number of pages | 4 |
| Journal | IEEE MTT-S International Microwave Symposium Digest |
| Volume | 2 |
| State | Published - 1990 |
| Externally published | Yes |
| Event | 1990 IEEE MTT-S International Microwave Symposium Digest Part 2 (of 3) - Dallas, TX, USA Duration: 8 May 1990 → 10 May 1990 |