This paper presents an oscillator employing miniature, high-Q, low temperature cofired ceramic (LTCC) resonator in conjunction with a novel implementation technique for achieving low phase noise. The reduced-size LTCC resonator is realized with a dielectric material having εr=68, the first ever reported. As well, the oscillator circuitry design exploits the seldom used device-line technique for obtaining the lowest possible phase noise with any chosen component. A free-running, 6 GHz oscillator using GaAs p-HEMT active device is built in a planar hybrid format suitable for System-In-Package (SIP) designs. The measured phase noise is -125 dBe/Hz at 1 MHz offset, with over 8 dBm of output power, which compares favorably with the best C-band oscillators. The technique herein demonstrates the feasibility of miniaturized, low-cost, SIP products.

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Keywords Ceramics, Low phase noise, LTCC, Oscillators, Resonators
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Conference 2006 IEEE MTT-S International Microwave Symposium Digest
Abielmona, S. (Samer), & Roy, L. (2006). A low phase noise microwave oscillator with a miniaturized LTCC resonator for SIP design. In IEEE MTT-S International Microwave Symposium Digest (pp. 589–592). doi:10.1109/MWSYM.2006.249662