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This paper describes a K-band 2-element phase-array receiver in 90 nm CMOS process. The receiver consists of two low noise amplifiers (LNAs), two vector modulators, and a down-converter mixer. The vector modulators are designed using a modified reflection-type in- and quadrature-phase modulator for amplitude and phase control. At 66 GHz, the measured small-signal gain of LNA is 24 dB with a noise...
In this paper, we present design and analysis of a K-band (18 to 26.5 GHz) low-phase-noise phase-locked loop (PLL) with the subharmonically injection-locked (SIL) technique. The phase noise of the PLL with subharmonic injection is investigated, and a modified phase noise model of the PLL with SIL technique is proposed. The theoretical calculations agree with the experimental results. Moreover, the...
In this paper, design and analysis of two modified Colpitts voltage-controlled oscillators (VCOs) with or without transformer feedback are presented. The loaded quality factors of these two VCOs are analyzed, and the result is the use of transformer feedback in the Colpitts oscillator decreases the loaded quality factor. Two K-band VCOs with and without transformer feedback using 0.5-μm GaAs enhancement/depletion...
A K-band high efficiency high output power frequency doubler in a 0.5-µm GaAs enhancement- and depletion-mode pseudomorphic high electron-mobility transistor (E/D-mode PHEMT) technology is presented in this paper. The doubler employs a configuration of a common-gate (CG) field effect transistor (FET) /common-source (CS) FET pair to enhance the second harmonic efficiently. Between 21 and 28 GHz, this...
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