Q-band 4-state phase shifter in planar technology: Circuit design and performance analysis

Abstract

Articles you may be interested in Low noise, 0.4-3 GHz cryogenic receiver for radio astronomy Rev. Sci. Instrum. 85, 104710 (2014) A 30% bandwidth phase shifter with four phase states is designed to be integrated in a radio astronomy receiver. The circuit has two 90• out-of-phase microwave phase-shifting branches which are combined by Wilkinson power dividers. Each branch is composed of a 180• phase shifter and a band-pass filter. The 180• phase shifter is made of cascaded hybrid rings with microwave PIN diodes as switching devices. The 90• phase shift is achieved with the two band-pass filters. Experimental characterization has shown significant results, with average phase shift values of −90.7• , −181.7• , and 88.5• within the operation band, 35-47 GHz, and mean insertion loss of 7.4 dB. The performance of its integration in a polarimetric receiver for radio astronomy is analyzed, which validates the use of the presented phase shifter in such type of receiver. Published by AIP Publishing. [http://dx

Parametric Design of a Class of Full-Band Waveguide Differential Phase Shifters

“…In Figure 3, the different step susceptances, Bsi, propagation constants, βsi and βr, and waveguide impedances, Zsi and Zr, are the geometry-related design parameters with respect to an empty waveguide of the same length L defined by βe and Ze. With the parameters defined in Figure 3, the ABCD matrix of half DPS can be established (1), and using this matrix it is feasible to obtain the overall input impedance (2) and voltage transfer ratio (3). From this last expression, the amplitude must be equal to the unity and the phase must be equal to the nominal phase shift value with respect to the reference waveguide, i.e., the desired phase difference between both waveguides.…”

“…Many different technologies have been developed through the years for obtaining a differential phase shift within a circuit. This work deals with ridge waveguide-based DPSs because the structures based on planar circuits, such as microstrip technology [1], despite having a compact size, exhibit noticeable insertion loss and low power handling capabilities that hinder their utilization in many antenna feed networks. Substrate integrated waveguide (SIW) technology has emerged as an option for combining advantages from planar technology, such as compactness and low cost, and waveguide technology, such as high quality factors and low insertion loss.…”

Polarimetric receiver in the forty gigahertz band: new instrument for the Q-U-I joint Tenerife experiment

“…The polarimeter operation is based on electronic phase switching, with sixteen phase states generated by individual phase shifts of 0º, 90º, 180º or 270º in each receiver branch (Villa et al 2016), which provides four equivalent phase states in the receiver, each one obtained with four different combinations of the phase switches.…”

“…The microstrip circuit has two phase shifting branches with a 90º fixed phase difference which are combined using Wilkinson dividers, and each branch has an individual 0/180º phase shifter. Further details are described byVilla et al (2016). Besides, the module provides full switching functionality with the use of transistor-transistor logic (TTL) drivers, model DR65-0109 from MACOM Technology.…”

“…14. The phase performance of the module shows average phase shifts of 88.5º, 178.3º and 269.3º over the band(Villa et al 2016).…”