Complex loads for millimeter-wave digital phase shifter design
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Phase shift module
Extremely high frequency
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The development of MMIC (monolithic microwave integrated circuit) phase shifters and amplifiers at 20 and 44 GHz for application in space-based active antenna arrays is described. Radio frequency probing to characterize the active elements at these frequencies is shown to provide a good basis for the MMIC design. Measured performance results are presented for a 44-GHz phase-shifter switching element, all 16 states of a 4-b 20-GHz MMIC phase shifter, a 180 degrees 44-GHz phase shifter, and a three-stage 20-GHz amplifier.< >
Phase shift module
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A new technique for designing millimeter-wave 11.25° digital phase shifter circuit is presented. The proposed phase shifter were fabricated using a tandem stubs phase shifter for 11.25° at Ka-band. In the operating frequency from 30GHz to 31GHz, the VS WR of the phase shifter is less than 1.65, the insertion loss is less than 3dB, the phase shift is fixed around 11.25° and its accuracy is up to ±3 °.
Phase shift module
Extremely high frequency
Tandem
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A miniature high power, beryllia substrate, lumped element, PIN diode phase shifter has been developed. Design expressions are presented for two UHF models, which operate at kilowatt powers and exhibit 7% bandwidths with low insertion loss.
PIN diode
Phase shift module
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The paper present analysis of the features of microstrip discrete reflective phase shifters. The principle of multi-bit phase shiwfters design based on the transmission-type phase shifter is presented. Two specific schemes are given as the implementation example of the proposed phase shifters.
Phase shift module
Bit (key)
Microwave applications
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A new wide-band 180° micro-strip phase shifter network on TP-2 is presented in this paper. The network is composed of coupled lines and double 45° open and short stubs, which are shunted at the edge points of the main line respectively. To demonstrate the design methodology, a new structure 180° phase shifter network, operated at 3.5∼5.5GHz, were designed and fabricated using the design graphs, and were experimented. The measured performances of the phase shifter network were well in agreement with the corresponding the simulation ones over the operating bands, and showed broadband phase characteristics.
Phase shift module
Ku band
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The design of the MEMS millimeter-wave phase shifters for a millimeter-wave phased antenna array is given in this paper. The MEMS phase shifter has the advantages of small volume, light weight, wide frequency-band, low insertion loss, excellent reliability, easy integration with microwave circuits, and so on. A quasi-static numerical-analysis method together with microwave network theory are used to analyze and design the MEMS millimeter-wave phase shifter. A new structure of a MEMS phase shifter with better electrical characteristics is finally presented.
Phase shift module
Extremely high frequency
Frequency band
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In this paper, a low-cost microstrip line structure microwave phase shifter based on nematic liquid crystal materials is discussed. The device is built on a glass substrate: the two ports of this device have the coplanar waveguides (CPWs) with 50Ω impedance structure to feed the energies or extract signals at both ends of the phase shifter. The simulation validate the phase shift can reach 360 degrees, and the S21 parameter reaches -4.5dB in the frequency band 28-30Ghz. The practical device shows S21 insertion loss is -12~-15dB, the phase shift can reach 360 degrees, and it works well between +10°C~+65 °C. The phase-shifting repetition accuracy is less than 1 degree.
Phase shift module
Coplanar waveguide
Return loss
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A switched line microwave digital phase shifter and a hybrid coupler phase shifter using PIN diodes which are operated at center frequencies from 14GHz to 14.5GHz are presented. The former is able to realize 180 degree phase shift and the latter is able to realize 11.25 degree phase shift. The phase shifters are designed to implement on a microstrip circuit type. Both of the two phase shifters can achieve flat phase shift and low VSWR by adding open-end transmission lines to the circuit. The simulation result shows that the design is very effectual.
Phase shift module
PIN diode
Center frequency
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The topology of proposed phase discriminator circuit involves the elements of one type in the form of quadrature couplers. The structure is symmetrc and does not include either transmission line crossings or phase shifters, typically required under such circumstances. The complete phase discriminator can be made as one planar IC. Such a structure of the microwave phase discriminator is introduced for the first time.
Discriminator
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In this letter a novel substrate integrated waveguide (SIW) phase shifter is proposed. It consist of phase channels made by SIW with equal length and unequal width. Design equations and process are given with mathematical analysis. The propagation constant of the output signals have been adjusted by changing only the width of the output arms. As a result a novel phase shifter, is obtained accordingly. The experimental results of a prototype at 10 GHz shows 45 degrees phase difference between two outputs. Return loss and transmission coefficient are good agreement with simulation results in considered band.
Phase shift module
Waveguide
Return loss
Propagation constant
Phase difference
Constant (computer programming)
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