Abstract
The 24 GHz ISM-Band is very interesting for low-cost radars. Due to cost demands no expensive phase stabilization of oscillators is possible. In this work, a free running first harmonic oscillator with a 12 GHz fundamental oscillation and a 24 GHz output signal is presented. For power combining purposes we investigated tlie injection locking mechanism at the first harmonic. Two arrays consisting of three and 16 oscillators, respectively, were developed and built. Mutual phase locking was achieved by means of coupling structures integrated in the antennas resulting in power combining the far field. High output power due to the power combining without the requirement of costly amplifiers and frequency stabilization due to injection locking is very advantageous for low-cost radar systems. Additional stabilization can be obtained by coupling the system with an external source.
| Original language | English |
|---|---|
| Pages (from-to) | 91-94 |
| Number of pages | 4 |
| Journal | IEEE MTT-S International Microwave Symposium Digest |
| Volume | 1 |
| State | Published - 2004 |
| Event | 2004 IEEE MITT-S International Microwave Symposium Digest - Fort Worth, TX, United States Duration: 6 Jun 2004 → 11 Jun 2004 |