A hybrid oscillator at 1.9805 GHz using acoustic surface transverse wave (STW) delay lines operating at the third harmonic as the frequency controlling element is discussed. The STW delay lines were fabricated on 37.5$^\textrm\textbackslashcirc\$$-rotated Y-cut quartz substrates with a photolithographic technique. A very thin metallization (25 nm) was used to obtain low insertion loss. A split isolated electrode design was used for the transducers. The Q-value and the untuned insertion loss of the STW filter were 3400 and 21 dB, respectively. The phase noise and temperature stability of the oscillator were characterized. At a power output of 6.5 dBm a single-sideband phase noise-to-carrier ratio of -100 dBc/Hz at 1 kHz was attained     «

A hybrid oscillator at 1.9805 GHz using acoustic surface transverse wave (STW) delay lines operating at the third harmonic as the frequency controlling element is discussed. The STW delay lines were fabricated on 37.5$^\textrm\textbackslashcirc\$$-rotated Y-cut quartz substrates with a photolithographic technique. A very thin metallization (25 nm) was used to obtain low insertion loss. A split isolated electrode design was used for the transducers. The Q-value and the untuned insertion loss of t...     »

microwave integrated circuits, hybrid integrated circuits, microwave oscillators, UHF, surface acoustic wave devices, delay lines, photolithographic technique, transducers, 1.9805 to 2 GHz, 21 dB, acoustic microwave devices, acoustic surface transverse wave, frequency controlling element, hybrid oscillator, low insertion loss, low phase noise, microwave oscillator, radiofrequency oscillators, SAW device, split isolated electrode design, surface transverse wave oscillator, temperature stability, thin metallization, third harmonic, ultrasonic delay lines, Y-cut quartz substrates     «

microwave integrated circuits, hybrid integrated circuits, microwave oscillators, UHF, surface acoustic wave devices, delay lines, photolithographic technique, transducers, 1.9805 to 2 GHz, 21 dB, acoustic microwave devices, acoustic surface transverse wave, frequency controlling element, hybrid oscillator, low insertion loss, low phase noise, microwave oscillator, radiofrequency oscillators, SAW device, split isolated electrode design, surface transverse wave oscillator, temperature stability,...     »