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Title: 360° phase detector cell for measurement systems based on switched dual multipliers
Authors: Pérez, Baltasar 
Araña, Víctor A. 
Pérez Mato, Javier 
Cabrera, Francisco 
UNESCO Clasification: 3325 Tecnología de las telecomunicaciones
Keywords: 360° phase shift detector
Microwave analog multiplier phase detector
Phase detectorarray
Issue Date: 2017
Journal: IEEE Microwave and Wireless Components Letters 
Abstract: This letter presents a 360° phase detector cell for performing phase-shift measurements on multiple output systems. An analog phase detector, capable of detecting a maximum range of ±90°, has been used to perform a double multiplication of two signals, both in-phase and phase-shifted. The proposed solution broadens the frequency range beyond other solutions that require to fulfill the quadrature condition. Subsequently, the possibility of reaching the theoretical limit of phase shift within a hybrid coupler (Φ < 90° ± 90°) is discussed by using four straight-line equations to characterize the phase detector response. The proposed solution allows to extend up to 360° the phase detection range and provide an increased immunity with respect to both impedance mismatching and phase deviations within the hybrid coupler. To demonstrate the feasibility of the proposed design, a phase detector cell prototype has been implemented using a commercial hybrid coupler with a phase shift of 92.5° ± 0.5° at 3.1-5.9 GHz, an external switch and a microcontroller with 2 kB of memory. Measurements show a range of detection of 360° (±180°) across the tested frequency band of 2.7-6 GHz.
ISSN: 1531-1309
DOI: 10.1109/LMWC.2017.2690841
Source: IEEE Microwave and Wireless Components Letters [ISSN 1531-1309], v. 27 (5), p. 503-505
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