A six-bit GMIC phase shifter for 6-18 GHz

Abstract

A low-loss broad-band six-bit phase shifter has been developed in a form suitable for airborne phased array radar applications. A glass-based microwave circuit integration technology (GMIC, Glass Microwave Integrated Circuit) is used, in which thi n-fi 1 in, process-oriented photolithographic technology is used to realize all of the passive components on a glass surface. Hybrid-coupled reflection circuitry covers the frequency range 6-18 GHz with losses averaging about 3 dB at 6 GHz to about 8 dB at 18 GHz over the 64 phase states covering a 360" range.

Triple stub circuit topology as simultaneous insertion phase, amplitude and impedance control circuit for phased array applications

“…This circuit is simulated using Microwave Office [20] at a centre Fig. 1 Schematic of the triple stub circuit topology frequency of 15 GHz in 0 -3608 range with 18 steps, where the lengths of the stubs are calculated using (7) - (10). The effective permittivity of the transmission lines, 1 r, eff , is selected as 1 during the simulations.…”

“…To see the possible effects of the transmission line losses, the circuit is simulated again by adding the attenuation constants to the model and without changing any other parameters, where the lengths of the stubs are again calculated using (7) - (10). The simulation results are given in Fig.…”

“…These are ferrite [2] and electronic switch phase shifters. Electronic switch phase shifters that use digital phase shift steps can be basically categorised into four types [3,4], which are switched line [5,6], reflection [7,8], loaded line [9,10] and switched network [3,11] phase shifters. All of these types have been investigated in detail from different aspects [3,4,9].…”

A 6-18 GHz 5-Bit Phase Shifter MMIC Using Series/Parallel LC Circuit

“…A reflection type phase shifter is able to operate in a relatively wide frequency range over other circuit designs [1]- [3]. However, the chip size is tending to be large mainly due to 3-dB hybrid couplers used in it.…”

An ultrawideband microwave phase shifter

“…Switched line phase shifters are time-delay transmission-type circuits switching between sections of transmission lines of different lengths, with relative frequency bandwidth of about 15 %. Hybrid coupled digital phase shifters are narrowband reflection devices with typical -10-35 % bandwidth, but one can also find IC devices covering up to 4:l frequency range [3]- [4]. Loaded line phase shifters include transmission lines loaded with two identical two-state switchable reactive elements with an average 10-40 % bandwidth [1], [5].…”