scholarly journals Electronically Controllable Phase Shifter with Progressive Impedance Transformation at K Band

2019 ◽  
Vol 9 (23) ◽  
pp. 5229
Author(s):  
Mohamed T. ElKhorassani ◽  
Angel Palomares-Caballero ◽  
Antonio Alex-Amor ◽  
Cleofás Segura-Gómez ◽  
Pablo Escobedo ◽  
...  
Keyword(s):  
Phase Shift ◽  
Phase Shifter ◽  
Dynamic Range ◽  
Phase Shifting ◽  
Final Phase ◽  
Hybrid Coupler ◽  
Electronically Tunable ◽  
Electronically Controllable ◽  
Good Agreement ◽  
K Band

This communication presents the design of a two-port electronically tunable phase shifter at K band. The phase shifter consists of a 3 dB hybrid coupler loaded with reflective phase-controllable circuits. The reflective circuits are formed by varactors and non-sequential impedance transformers which increase the operational bandwidth and the provided phase shift. The final phase shifter design is formed by two loaded-coupler stages of phase shifting to guarantee a complete phase turn. An 18 GHz phase shifter design with dynamic range of 600 degrees of phase shift is depicted in this document. The prototype is manufactured and validated through measurements showing good agreement with the simulation results.

SIMULATION OF CO-PLANAR WAVEGUIDE LIQUID CRYSTAL BASED PHASE SHIFTER

2015 ◽  
Vol 77 (10) ◽  
Author(s):  
Nasser A ALQuaiti ◽  
Noor Asniza Murad
Keyword(s):  
Liquid Crystal ◽  
Phase Shift ◽  
Phase Shifter ◽  
Low Cost ◽  
Continuous Phase ◽  
Phase Shifting ◽  
Telecommunication System ◽  
Liquid Crystal Material ◽  
Compact Size ◽  
5Cb Liquid Crystal

This paper discussed the design and performances of a liquid crystal phase shifter that can be used in tuning devices. Tuning devices growth with the demand in the emerging in telecommunication system. Tuning devices with smooth continuous phase shifting at low cost and compact size would be an advantage. This paper proposed a phase shifter using 5CB liquid crystal material. The advantages of using the material is the smoothness and continuity of the transitions in the phase shift. It is done by having a structure with cavity filled with the liquid crystal and applied with certain voltage that can be changed. The changes in voltage would change the applied electric field, and thus would change the permittivity of the material. The changes would affect the wave propagation and thus contribute to the phase shifting. The performance of the phase shifter was tested by means of simulation using CST Suite 2014 software. The results show that the higher the frequency, the higher the phase shift would occur. The highest FoM achieved is 68 (deg/dB) at 8 GHz. A phase shifter with smooth and continuous phase shift can be used as the feeding network in an array scanning antennas systems.

scholarly journals Design of a Two-Element Antenna Array Using Substrate Integrated Waveguide Technique

2011 ◽  
Vol 2011 ◽  
pp. 1-7
Author(s):  
Kheireddine Sellal ◽  
Larbi Talbi
Keyword(s):  
Antenna Array ◽  
Phase Shifter ◽  
Phased Array ◽  
Phase Shifting ◽  
Experimental Measurements ◽  
Substrate Integrated Waveguide ◽  
Slot Antennas ◽  
Theory And Experiments ◽  
Better Than ◽  
Good Agreement

The design of a two-element antenna array using the substrate integrated waveguide (SIW) technique and operating at 10 GHz is presented. The proposed antenna array consists of two SIW phase shifter sections with two SIW slot antennas. The phase shifting is achieved by changing the position of two inductive posts inserted inside each element of the array. Numerical simulations and experimental measurements have been carried out for three differential phases between the two antenna array elements, namely, 0°, 22.5°, and 67.5°. A prototype for each differential phase has been fabricated and measured. Results have shown a fairly good agreement between theory and experiments. In fact, a reflection coefficient of better than 20 dB has been achieved around 10 GHZ. The E-plane radiation pattern has shown a beam scan between 5° and 18° and demonstrated the feasibility of designing an SIW antenna phased array.

scholarly journals Ripple Suppression in Broadband Microwave Photonic Phase Shifter Frequency Response

2018 ◽  
Vol 8 (12) ◽  
pp. 2433 ◽  
Author(s):  
Weicheng Xia ◽  
Ruiqi Zheng ◽  
Bijuan Chen ◽  
Erwin Chan ◽  
Xudong Wang ◽  
...  
Keyword(s):  
Frequency Response ◽  
Phase Shifter ◽  
Dynamic Range ◽  
Optical Filter ◽  
Signal Amplitude ◽  
Wide Frequency Range ◽  
Amplitude Variation ◽  
Microwave Photonic ◽  
Phase Deviation ◽  
Hybrid Coupler

This paper presents a detailed investigation on the cause of ripples in the frequency response of a microwave photonic phase shifter implemented using a 90° hybrid coupler. It was found that an unwanted radio frequency (RF) modulation sideband is generated at the modulator output due to the 90° hybrid coupler amplitude and phase imbalance. This resulted in phase shifter output RF signal amplitude variation and phase deviation. Experimental results demonstrated that incorporating an optical filter in the phase shifter structure can reduce the amplitude variation and phase deviation from 4.2 dB to 2.2 dB and from ±12° to ±3.8°, respectively, over a wide frequency range. A comparison of the loss and the dynamic range of the microwave photonic phase shifter implemented using a 90° hybrid coupler with a conventional fiber optic link is also presented.

scholarly journals Color Digital Holography Based on Generalized Phase-Shifting Algorithm with Monitoring Phase-Shift

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 241
Author(s):  
Minwoo Jung ◽  
Hosung Jeon ◽  
Sungjin Lim ◽  
Joonku Hahn
Keyword(s):  
Phase Shift ◽  
Focal Plane ◽  
Digital Holography ◽  
Phase Shifter ◽  
Phase Shifting ◽  
Signal Wave ◽  
Color Filter ◽  
Object Image ◽  
Phase Shift Error ◽  
Monitoring Phase

Color digital holography (DH) has been researched in various fields such as the holographic camera and holographic microscope because it acquires a realistic color object wave by measuring both amplitude and phase. Among the methods for color DH, the phase-shifting DH has an advantage of obtaining a signal wave of objects without the autocorrelation and conjugate noises. However, this method usually requires many interferograms to obtain signals for all wavelengths. In addition, the phase-shift algorithm is sensitive to the phase-shift error caused by the instability or hysteresis of the phase shifter. In this paper, we propose a new method of color phase-shifting digital holography with monitoring the phase-shift. The color interferograms are recorded by using a focal plane array (FPA) with a Bayer color filter. In order to obtain the color signal wave from the interferograms with unexpected phase-shift values, we devise a generalized phase-shifting DH algorithm. The proposed method enables the robust measurement in the interferograms. Experimentally, we demonstrate the proposed algorithm to reconstruct the object image with negligibly small conjugate noises.

scholarly journals A Reflection-Type Dual-Band Phase Shifter with an Independently Tunable Phase

2022 ◽  
Vol 12 (1) ◽  
pp. 492
Author(s):  
Suyeon Kim ◽  
Junhyung Jeong ◽  
Girdhari Chaudhary ◽  
Yongchae Jeong
Keyword(s):  
Frequency Band ◽  
Transmission Lines ◽  
Phase Shifter ◽  
Phase Shifting ◽  
Dual Band ◽  
Operating Frequency ◽  
Operating Frequency Band ◽  
Quarter Wavelength ◽  
Hybrid Coupler ◽  
Insertion Losses

This paper presents a design for a dual-band tunable phase shifter (PS) with independently controllable phase shifting between each operating frequency band. The proposed PS consists of a 3-dB hybrid coupler, in which the coupled and through ports terminate with the same two reflection loads. Each reflection load consists of a series of quarter-wavelength (λ/4) transmission lines, λ/4 shunt open stubs, and compensation elements at each operating frequency arm. In this design, a wide phase shifting range (PSR) is achievable at each operating frequency band (fL: lower frequency; fH: higher frequency) by compensating for the susceptance occurring at the co-operating frequency band caused by the λ/4 shunt open stub. The load of fL does not affect the load of fH and vice versa. The dual-band tunable PS was fabricated at fL = 1.88 GHz and fH = 2.44 GHz, and testing revealed that achieved a PSR of 114.1° with an in-band phase deviation (PD) of ± 8.43° at fL and a PSR of 114.0° ± 5.409° at fH over a 100 MHz bandwidth. In addition, the maximum insertion losses were smaller than 1.86 dB and 1.89 dB, while return losses were higher than 17.2 dB and 16.7 dB within each respective operating band.

K-band reflection-type phase shifter using phase-shift range enhancement technique

2013 ◽  
Vol 27 (16) ◽  
pp. 2135-2144 ◽  
Author(s):  
Han-Lim Lee ◽  
Seong-Mo Moon ◽  
Moon-Que Lee ◽  
Jong-Wo Yu
Keyword(s):  
Phase Shift ◽  
Phase Shifter ◽  
Enhancement Technique ◽  
Type Phase ◽  
K Band

Optical-to-RF phase shift conversion-based microwave photonic phase shifter using a fiber Bragg grating

2013 ◽  
Vol 39 (1) ◽  
pp. 142 ◽  
Author(s):  
Xudong Wang ◽  
Erwin H. W. Chan ◽  
Robert A. Minasian
Keyword(s):  
Phase Shift ◽  
Fiber Bragg Grating ◽  
Phase Shifter ◽  
Bragg Grating ◽  
Microwave Photonic

A 60 GHz reconfigurable active phase shifter based on a vector modulator in 65 nm CMOS technology

2016 ◽  
Vol 8 (3) ◽  
pp. 399-404 ◽  
Author(s):  
Boris Moret ◽  
Nathalie Deltimple ◽  
Eric Kerhervé ◽  
Baudouin Martineau ◽  
Didier Belot
Keyword(s):  
Phase Shift ◽  
Phase Shifter ◽  
Complementary Metal Oxide Semiconductor ◽  
Active Phase ◽  
Cmos Technology ◽  
Oxide Semiconductor ◽  
60 Ghz ◽  
Semiconductor Technology ◽  
Vector Modulator ◽  
Active Phase Shifter

This paper presents a 60 GHz reconfigurable active phase shifter based on a vector modulator implemented in 65 nm complementary metal–oxide–semiconductor technology. This circuit is based on the recombination of two differential paths in quadrature. The proposed vector modulator allows us to generate a phase shift between 0° and 360°. The voltage gain varies between −13 and −9 dB in function of the phase shift generated with a static consumption between 26 and 63 mW depending on its configuration.

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