A compact ferroelectric phase shifter using lumped-element quarter-wave-length transmission lines

2004 ◽  
Author(s):  
Dongsu Kim ◽  
Sangsoo Je ◽  
J. Stevenson Kenney ◽  
P. Many
Keyword(s):  
Transmission Lines ◽  
Phase Shifter ◽  
Ferroelectric Phase ◽  
Wave Length ◽  
Lumped Element ◽  
Quarter Wave

scholarly journals Theory and Design of a Flexible Two-Stage Wideband Wilkinson Power Divider

Electronics ◽  
2021 ◽  
Vol 10 (17) ◽  
pp. 2168
Author(s):  
Antra Saxena ◽  
Mohammad Hashmi ◽  
Deepayan Banerjee ◽  
Muhammad Akmal Chaudhary
Keyword(s):  
Transfer Function ◽  
Transmission Lines ◽  
Short Circuit ◽  
Wide Band ◽  
Power Divider ◽  
Design Parameters ◽  
Two Stage ◽  
Quarter Wave ◽  
Band Pass ◽  
Wilkinson Power Divider

This article presents the design scheme of a wideband Wilkinson Power Divider (WPD) with two-stage architecture utilizing quarter-wave transmission lines and short-circuit stubs. The bandwidth of the proposed WPD is flexible and can be controlled using the design parameters. The proposed design achieves excellent isolation between output ports in addition good in-band performance. The analysis of the proposed circuit results in a simplified transfer function which is then equated with a standard band-pass transfer function to determine the parameters of transmission lines, stub’s impedances, and the value of the isolation resistors. Furthermore, it is also demonstrated that a simple alteration in the proposed circuit enables the design of a wideband DC isolated WPD that maintains a good in-band and isolation performance. A number of case studies have been included to highlight the flexibility of the proposed design. Two distinct prototypes are developed on different boards to demonstrate the wideband performance of the proposed design. An excellent agreement between the experimental and measured results for both the designs over a wide band including very good isolation between ports validate the proposed design.

Voltage-controlled liquid-crystal terahertz phase shifter and quarter-wave plate

2006 ◽  
Vol 31 (8) ◽  
pp. 1112 ◽  
Author(s):  
Cho-Fan Hsieh ◽  
Ru-Pin Pan ◽  
Tsung-Ta Tang ◽  
Hung-Lung Chen ◽  
Ci-Ling Pan
Keyword(s):  
Liquid Crystal ◽  
Phase Shifter ◽  
Quarter Wave Plate ◽  
Wave Plate ◽  
Quarter Wave

An LTCC Based Filter and Front End Module using Heterogeneous Dielectrics

2006 ◽  
Vol 3 (3) ◽  
pp. 129-135 ◽  
Author(s):  
Jun Chul Kim ◽  
Dongsu Kim ◽  
Hyun Min Cho ◽  
Jong Chul Park ◽  
Nam Kee Kang
Keyword(s):  
Power Amplifier ◽  
Bandpass Filter ◽  
Wave Length ◽  
Signal Delay ◽  
Ceramic Substrates ◽  
Front End ◽  
Quarter Wave ◽  
Front End Module ◽  
Signal Delay Time ◽  
Shunt Capacitor

This paper presents a multi-layered bandpass filter (BPF) and a power amplifier module (PAM) integrated with a SAW duplexer based on heterogeneous ceramic substrates. The heterogeneous substrates are composed of two different ceramic layers with εr = 7.4 and 17.5 in order to take advantage of their own properties. In the PAM substrate, a DC blocking capacitor and a shunt capacitor for an output matching network of a power amplifier are embedded with a material of εr = 17.5 to reduce occupied areas of the capacitors. On the other hand, a quarter-wave-length stripline and RF chokes are realized with a material of εr = 7.4 to reduce signal delay time. In the multi-layered BPF, a coupled stripline and a high shunt capacitor are embedded with materials of εr = 7.4 and 17.5, respectively, resulting in improved spurious characteristics.

Coupled Microstrip Line Ferroelectric Phase Shifter for Ka-Band Phased Array Antenna

2004 ◽  
Vol 66 (1) ◽  
pp. 243-252 ◽  
Author(s):  
HAN-CHEOL RYU ◽  
SEUNG EON MOON ◽  
SU-JAE LEE ◽  
MIN-HWAN KWAK ◽  
YOUNG-TAE KIM ◽  
...  
Keyword(s):  
Microstrip Line ◽  
Phase Shifter ◽  
Phased Array ◽  
Ferroelectric Phase ◽  
Array Antenna ◽  
Phased Array Antenna ◽  
Ka Band

scholarly journals Analysis and Optimization of Thin-Film Ferroelectric Phase Shifters

1999 ◽  
Vol 603 ◽  
Author(s):  
R. R. Romanofsky ◽  
F. W. Van Keuls ◽  
J. D. Warner ◽  
C. H. Mueller ◽  
S. A. Alterovitz ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Room Temperature ◽  
Phase Shifter ◽  
Ferroelectric Phase ◽  
Phase Shifters ◽  
Phased Array Antenna ◽  
New Type ◽  
Novel Devices ◽  
K Band

AbstractMicrowave phase shifters have been fabricated from (YBa2Cu3 O7-δ or Au)/SrTiO3 and Au/BaxSr1−xTiO3 films on LaAlO3 and MgO substrates. These coupled microstrip devices rival the performance of their semiconductor counterparts at Ku- and K-band frequencies. Typical insertion loss for room temperature ferroelectric phase shifters at K-band is ≈5 dB. An experimental and theoretical investigation of these novel devices explains the role of the ferroelectric film in overall device performance. A roadmap to the development of a 3 dB insertion loss phase shifter that would enable a new type of phased array antenna is discussed.

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