Low-cost Compact Analogue Phase-Shifter based on CVD Graphene-diode for Smart Surfaces Applications

2021 ◽  
Author(s):  
Mohamed Saeed ◽  
Ahmed Hamed ◽  
Eyyub Baskent ◽  
Burkay Uzlu ◽  
Zhenxing Wang ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Low Cost ◽  
Cvd Graphene ◽  
Smart Surfaces

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.

Application of Ferroelectrics in Low-Cost Microwave Phased-Array Antennas

2002 ◽  
Vol 720 ◽  
Author(s):  
J. B. L. Rao ◽  
D. P. Patel ◽  
P. K. Park ◽  
T. K. Dougherty ◽  
J. A. Zelik ◽  
...  
Keyword(s):  
Phase Shifter ◽  
Phased Array ◽  
Low Cost ◽  
Bulk Phase ◽  
Phase Shifting ◽  
Phased Array Antenna ◽  
Beam Scanning ◽  
Phased Array Antennas ◽  
Array Antennas ◽  
Radiating Element

AbstractA novel, low-cost, phased-array antenna that uniquely incorporates bulk phase shifting using voltage-tunable dielectric (VTD) material is presented. The array does not contain an individual phase shifter at each radiating element. This paper presents the antenna concept and describes how it can be used as a low-cost phased array. The VTDs that are used in this antenna are described. The measured antenna patterns of a prototype phased array demonstrating electronic beam scanning at 10 GHz are also presented.

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 26 GHz phase shifters for multi-beam nolen matrix towards fifth generation (5G) technology

2019 ◽  
Vol 8 (3) ◽  
pp. 1028-1035
Author(s):  
Norhudah Seman ◽  
Nazleen Syahira Mohd Suhaimi ◽  
Tien Han Chua
Keyword(s):  
Dielectric Constant ◽  
Microstrip Line ◽  
Return Loss ◽  
Phase Shifter ◽  
Low Cost ◽  
Phase Shifters ◽  
Substrate Thickness ◽  
Fifth Generation ◽  
Compact Size ◽  
Better Than

This paper presents the designs of phase shifters for multi-beam Nolen matrix towards the fifth generation (5G) technology at 26 GHz. The low-cost, lightweight and compact size 0° and 45° loaded stubs and chamfered 90°, 135° and 180° Schiffman phase shifters are proposed at 26 GHz. An edge at a corner of the 50 Ω microstrip line Schiffman phase shifter is chamfered to reduce the excess capacitance and unwanted reflection. However, the Schiffman phase shifter topology is not relevant to be applied for the phase shifter less than 45° as it needs very small arc bending at 26 GHz. The stubs are loaded to the phase shifter in order to obtain electrical lengths, which are less than 45°. The proposed phase shifters provide return loss better than 10 dB, insertion loss of -0.97 dB and phase difference imbalance of ± 4.04° between 25.75GHz and 26.25 GHz. The Rogers RT/duroid 5880 substrate with dielectric constant of 2.2 and substrate thickness of 0.254 mm is implemented in the designs.

scholarly journals Design of 3-Bit Digital RF Phase Shifter for Wireless Communication

2019 ◽  
Vol 8 (2) ◽  
pp. 2292-2296
Keyword(s):  
Phase Shift ◽  
Wireless Communication ◽  
Transmission Line ◽  
Phase Shifter ◽  
Phased Array ◽  
Low Cost ◽  
Phase Shifters ◽  
Phased Array Antenna ◽  
Radio System ◽  
Digital Phase

In this paper, a 3-bit digital phase shifter based on switched transmission line technique using coplanar waveguide is proposed. The design has the resonant frequency of 10 GHz which can be used in wireless communication applictaions. Recent developments in radio frequency components development has raised as a significant way for constructing low loss phase shifters. MEMS phase shifters whose insertion loss is low and high isolation uses minimum power. This helps to bring low cost and light weighted phased array antennas. The transmission line length and wavelength decides the characteristics of phase shift. The phase shifter design consists of coplanar waveguides having center conductor width of 100µm and the gap of 14 µm on a FR-4 epoxy substrate with thickness of 1.6mm. The design is simulated using ADS to yield phase shift of 45, 90 and 180. The benefits of digital phase shifters include achieving flat phase over a wide bandwidth as well as having higher power handling and linearity with uniform performance. The phase shifters are used in different fields which includes microwave devices, feeder of radio system, phased array antenna, coherent radio system, etc.

Fully Printed Static Gain Reconfigurable Conformal Patch Antenna Arrays

2017 ◽  
Vol 2017 (1) ◽  
pp. 000604-000607
Author(s):  
Nolan Grant ◽  
Mahdi Haghzadeh ◽  
Alkim Akyurtlu
Keyword(s):  
Radiation Pattern ◽  
Antenna Arrays ◽  
Patch Antenna ◽  
Phase Shifter ◽  
Mechanical Design ◽  
Low Cost ◽  
Beam Steering ◽  
Flexible Substrate ◽  
New Left ◽  
Phase Compensation

Abstract This work presents design and fabrication processes for creating statically gain-reconfigurable conformal patch array antennas. In our previous work, a fully printable and conformal antenna array on a flexible substrate with a new Left-Handed Transmission Line (LHTL) phase shifter based on a Barium Strontium Titanate (BST)/polymer composite was computationally studied for radiation pattern correction and beam steering applications. In this work, additive manufacturing techniques were used to experimentally demonstrate the phase compensation needed to improve the degraded performance of the conformal arrays. An Aerosol Jet direct-write printer was used to print several patch antenna arrays and was tested in an anechoic chamber to establish baseline gain metrics. Once a baseline is established, a high dielectric constant material (BST nano-ink) was dispensed onto the IDCs in several configurations, to provide the necessary phase compensation. The antennas were retested and the changes in their gain profiles were investigated. The findings of this work and the proposed method allow for gain compensation of curved conformal antennas and post-production modification of the radiation pattern of antenna arrays. This work has potential applications in the automotive industry due to the low cost of production and the ability to be integrated onto curved conformal surfaces without interfering with super structure or other mechanical design related criteria.

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