Compact and Fast Response Phase Shifter Based on Liquid Crystal

2021 ◽  
Author(s):  
Qipeng Wang ◽  
Yue Su ◽  
Zhiguo Su ◽  
Hongxin Zhao ◽  
Xiaoxing Yin
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Fast Response ◽  
Response Phase

Fast Response Phase Modulator in Infrared Waveband Based on Polymer Network Liquid Crystal

2014 ◽  
Vol 34 (6) ◽  
pp. 0623001
Author(s):  
赵祥杰 Zhao Xiangjie ◽  
刘仓理 Liu Cangli ◽  
曾建成 Zeng Jiancheng ◽  
张大勇 Zhang Dayong ◽  
骆永全 Luo Yongquan
Keyword(s):  
Liquid Crystal ◽  
Polymer Network ◽  
Fast Response ◽  
Phase Modulator ◽  
Response Phase

P‐90: Student Poster: High Birefringence Liquid Crystal for Fast‐Response Phase Modulators

2021 ◽  
Vol 52 (1) ◽  
pp. 1416-1419
Author(s):  
Qian Yang ◽  
Junyu Zou ◽  
Haruki Ooishi ◽  
Zhuo Yang ◽  
Kifumi Yoshidaya ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Fast Response ◽  
High Birefringence ◽  
Phase Modulators ◽  
Response Phase

scholarly journals Temperature Characterization of Liquid Crystal Dielectric Image Line Phase Shifter for Millimeter-Wave Applications

Crystals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 63
Author(s):  
Henning Tesmer ◽  
Rani Razzouk ◽  
Ersin Polat ◽  
Dongwei Wang ◽  
Rolf Jakoby ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Millimeter Wave ◽  
Insertion Loss ◽  
Phase Shifter ◽  
Ground Plane ◽  
Temperature Dependent ◽  
Differential Phase ◽  
Dependent Behavior ◽  
The Impact ◽  
Temperature Dependent Behavior

In this paper we investigate the temperature dependent behavior of a liquid crystal (LC) loaded tunable dielectric image guide (DIG) phase shifter at millimeter-wave frequencies from 80 GHz to 110 GHz for future high data rate communications. The adhesive, necessary for precise fabrication, is analyzed before temperature dependent behavior of the component is shown, using the nematic LC-mixture GT7-29001. The temperature characterization is conducted by changing the temperature of the LC DIG’s ground plane between −10∘C and 80 ∘C. The orientation of the LC molecules, and therefore the effective macroscopic relative permittivity of the DIG, is changed by inserting the temperature setup in a fixture with rotatable magnets. Temperature independent matching can be observed, while the insertion loss gradually increases with temperature for both highest and lowest permittivity of the LC. At 80 ∘C the insertion loss is up to 1.3dB higher and at −10∘C it is 0.6dB lower than the insertion loss present at 20 ∘C. In addition, the achievable differential phase is reduced with increasing temperature. The impact of molecule alignment to this reduction is shown for the phase shifter and an estimated 85% of the anisotropy is still usable with an LC DIG phase shifter when increasing the temperature from 20 ∘C to 80 ∘C. Higher reduction of differential phase is present at higher frequencies as the electrical length of the phase shifter increases. A maximum difference in differential phase of 72∘ is present at 110 GHz, when increasing the temperature from 20 ∘C to 80 ∘C. Nevertheless, a well predictable, quasi-linear behavior can be observed at the covered temperature range, highlighting the potential of LC-based dielectric components at millimeter wave frequencies.

Space Radiation Environment Testing of Liquid Crystal Phase Shifter Devices

2016 ◽  
Vol 15 ◽  
pp. 1923-1926 ◽  
Author(s):  
Christopher D. Woehrle ◽  
Derek T. Doyle ◽  
Steven A. Lane ◽  
Christos G. Christodoulou
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Space Radiation ◽  
Crystal Phase ◽  
Radiation Environment ◽  
Liquid Crystal Phase ◽  
Space Radiation Environment

Fast response phase detector for a phase-locked loop

1995 ◽  
Vol 78 (3) ◽  
pp. 557-562 ◽  
Author(s):  
HURNG-LIAHNG JOU ◽  
JINN-CHANG WU
Keyword(s):  
Phase Locked Loop ◽  
Fast Response ◽  
Phase Detector ◽  
Response Phase

Fast response liquid crystal mode

2013 ◽  
Vol 21 (5) ◽  
pp. 209-212
Author(s):  
Chung-Yung Lee ◽  
Man-Chun Tseng ◽  
Hoi-Sing Kwok
Keyword(s):  
Liquid Crystal ◽  
Fast Response
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