A NEW K-BAND PUSH-PUSH VCO USING A MINIATURIZED HAIRPIN RESONATOR

In this article, a K-band push-push Voltage Controlled Oscillator (VCO) is presented using a manufacture happen resonator (MHR) with a higher loaded quality factor and the reduced circuit area within 50% compared to the conventional one at 9 2 GHz The MHR? combined with the GaAs MESFET varactor shows a tuning range of 140 MHz. and this voltage tunable MHR is used to compose a push-push VCO It provides the frequency mining range of 71 MHz with flatness of +0 13 dB. which is increased by 31 MHz compared to the conventional VCO The voltage controlled push-push oscillator based on the series feedback topology is implement on 0 54 mm-thick Teflon substrate with a dielectric constant of 2 54 The measurement shows the output power of 1 18 dBm, the fundamental signal power suppression of -33 dBc and phase noise performance of -86 78 dBc/Hz at 100 kHz offset (C) 2010 Wiley Periodicals. Inc Microwave Opt Technol Lett 52 699-701. 2010. published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.25007