Low-cost Microstrip-Based Ferrite Phase Shifter Utilizing Circular Polarization

2006 ◽  
Author(s):  
W.W.G. Hui ◽  
J.M. Bell ◽  
M.F. Iskander ◽  
J.J. Lee
Keyword(s):  
Circular Polarization ◽  
Phase Shifter ◽  
Low Cost ◽  
Ferrite Phase

scholarly journals Recent Developments of Reflectarray Antennas for Reconfigurable Beams Using Surface-Mounted RF-MEMS

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Eduardo Carrasco ◽  
Mariano Barba ◽  
Manuel Arrebola ◽  
Jose A. Encinar
Keyword(s):  
Phase Shifter ◽  
Rf Mems ◽  
Low Cost ◽  
Phase Control ◽  
Electronic Control ◽  
Delay Lines ◽  
Mems Switches ◽  
Manufacturing Complexity ◽  
Recent Developments ◽  
Control Devices

Some of the most recent developments in reconfigurable reflectarrays using surface-mounted RF-MEMS, which have been developed at the Universidad Politécnica de Madrid, are summarized in this paper. The results include reconfigurable elements based on patches aperture-coupled to delay lines in two configurations: single elements and gathered elements which form subarrays with common phase control. The former include traditional aperture-coupled elements and a novel wideband reflectarray element which has been designed using two stacked patches. The latter are proposed as a low cost solution for reducing the number of electronic control devices as well as the manufacturing complexity of large reflectarrays. The main advantages and drawbacks of the grouping are evaluated in both pencil and shaped-beam antennas. In all the cases, the effects of the MEMS switches and their assembly circuitry are evaluated when they are used in a 2-bit phase shifter which can be extended to more bits, demonstrating that the proposed elements can be used efficiently in reconfigurable-beam reflectarrays.

Multiferroic heterostructure fringe field tuning of meander line microstrip ferrite phase shifter

2010 ◽  
Vol 96 (5) ◽  
pp. 053508 ◽  
Author(s):  
A. L. Geiler ◽  
S. M. Gillette ◽  
Y. Chen ◽  
J. Wang ◽  
Z. Chen ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Ferrite Phase ◽  
Fringe Field ◽  
Meander Line ◽  
Multiferroic Heterostructure

Full-wave analysis of dielectric waveguide ferrite phase shifter with longitudinal magnetisation

1992 ◽  
Vol 28 (20) ◽  
pp. 1907 ◽  
Author(s):  
R. Andriamanjato ◽  
B. Chan ◽  
J.W. Tao ◽  
H. Baudrand
Keyword(s):  
Dielectric Waveguide ◽  
Phase Shifter ◽  
Ferrite Phase ◽  
Wave Analysis ◽  
Full Wave ◽  
Full Wave Analysis

The Microwave Permeability of a Ferrite-Filled Parallel-Plate Transmission Structure

1973 ◽  
Vol 51 (23) ◽  
pp. 2495-2497
Author(s):  
C. K. Campbell
Keyword(s):  
Parallel Plate ◽  
Effective Permeability ◽  
Phase Shifter ◽  
Permeability Tensor ◽  
Ferrite Phase ◽  
Circularly Polarized ◽  
Polarized Waves ◽  
Transmission Structure ◽  
Microwave Permeability

With the aid of a phasor diagram it is shown that the scalar effective permeability μe = (μ2 − K2)/μ of a parallel-plate longitudinally magnetized microwave ferrite phase shifter may be simply obtained in terms of four circularly polarized waves relating to the permeability tensor eigenvalues μ + K and μ − K.

scholarly journals Circular polarization reconfigurable antenna for mid-band 5G applications with a new reconfigurable technique

2020 ◽  
Vol 19 (2) ◽  
pp. 802
Author(s):  
Alaa Imran AL-Muttairi ◽  
Malik Jasim Farhan
Keyword(s):  
Resonant Frequency ◽  
Circular Polarization ◽  
Low Cost ◽  
Axial Ratio ◽  
Maximum Size ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Commercial Software ◽  
Innovative Technique

In this paper, a novel low cost, single-feed, and circular polarization reconfigurable antenna is designed and fabricated for future mid-band 5G applications. An innovative technique is used in this approach, which combines three techniques, namely: polygon U-slot, switchable vertical or horizontal slots, and shorting posts. The proposed antenna can alter its polarization sense between RHCP and LHCP with the ability to adjust the axial ratio position with respect to frequency along the impedance bandwidth of the antenna. The antenna is built on RT/duroid 5880 substrate with a maximum size of (31*31*3.15) .Two real diodes are integrated across the slot to change polarization sense. CST commercial software is used to simulate the antenna, and then it is fabricated and measured practically. Good agreements between the two results are achieved. However, The antenna has impedance bandwidth starting from 3.4995GHz to 3.73GHz with overlapped axial ratio bandwidth of 2.1% for both operation senses. Also, the antenna has good gain, and it has one resonant frequency at 3.6GHz for both operating states.

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