Novel Wideband Single-Layer 90∘ Phase Shifter Based on Radial-Stub and Weak Coupled-Line

2016 ◽  
Vol 25 (12) ◽  
pp. 1650162
Author(s):  
Qiang Liu ◽  
Yong Li ◽  
Yuanan Liu
Keyword(s):  
Phase Shifter ◽  
Low Cost ◽  
Single Layer ◽  
Coupled Line ◽  
Existing Structures ◽  
Radial Stub ◽  
Phase Deviation ◽  
Line Coupling ◽  
Circuit Configuration ◽  
Better Than

This paper proposes a novel wideband 90[Formula: see text] phase shifter, which comprises a radial stub, a uniform transmission line, and a weak coupled-line (coupling coefficient [Formula: see text] dB). The circuit configuration and theoretical analysis equations of the phase shifter are presented. Results demonstrate that the bandwidth (BW) with acceptable phase deviation can be obviously improved by increasing the spanning angle of the radial-stub and the coupling strength of the coupled-line. For return loss better than 10 dB, insertion loss less than 1.05 dB, and phase deviation of [Formula: see text] 8.5[Formula: see text], the fabricated microstrip single-layer phase shifter exhibits BW of 118% from 0.65 GHz to 2.51 GHz. Compared with existing structures, the proposed phase shifter not only has the largest BW but also features simple structure, low-cost, convenient installation, and good portability.

A Novel Wideband transition from Substrate Integrated Waveguide to Rectangular Waveguide

2020 ◽  
Vol 10 ◽  
Author(s):  
Keyur Mahant ◽  
Hiren Mewada ◽  
Amit Patel ◽  
Alpesh Vala ◽  
Jitendra Chaudhari
Keyword(s):  
Rectangular Waveguide ◽  
Printed Circuit Board ◽  
Low Cost ◽  
Single Layer ◽  
Circuit Board ◽  
Substrate Integrated Waveguide ◽  
Ka Band ◽  
Better Than ◽  
Millimeter Wave Circuits ◽  
Wideband Transition

Aim: In this article, wideband substrate integrated waveguide (SIW) and rectangular waveguide (RWG) transition operating in Ka-band is proposed Objective: In this article, wideband substrate integrated waveguide (SIW) and rectangular waveguide (RWG) transition operating in Ka-band is proposed. Method: Coupling patch etched on the SIW cavity to couple the electromagnetic energy from SIW to RWG. Moreover, metasurface is introduced into the radiating patch to enhance bandwidth. To verify the functionality of the proposed structure back to back transition is designed and fabricated on a single layer substrate using standard printed circuit board (PCB) fabrication technology. Results: Measured results matches with the simulation results, measured insertion loss is less than 1.2 dB and return loss is better than 3 dB for the frequency range of 28.8 to 36.3 GHz. By fabricating transition with 35 SRRs bandwidth of the proposed transition can be improved. Conclusion: The proposed transition has advantages like compact in size, easy to fabricate, low cost and wide bandwidth. Proposed structure is a good candidate for millimeter wave circuits and systems.

COMPACT WILKINSON PASS-BAND FILTERING POWER DIVIDER BASED ON QUARTER-WAVELENGTH SIDE-COUPLED RING

2014 ◽  
Vol 23 (10) ◽  
pp. 1450135
Author(s):  
YONGLE WU ◽  
QIANG LIU ◽  
JUNYU SHEN ◽  
YUANAN LIU
Keyword(s):  
Low Cost ◽  
Single Layer ◽  
Power Divider ◽  
Pass Band ◽  
Fractional Bandwidth ◽  
Coupled Line ◽  
Quarter Wavelength ◽  
Wilkinson Power Divider ◽  
Isolation Performance ◽  
Wavelength Side

A Wilkinson power divider with improved bandpass filtering and high isolation performance is proposed. These characteristics are achieved by replacing the quarter-wavelength transmission line in the conventional coupled line Wilkinson power divider with quarter-wavelength side-coupled ring (QSCR). Additional features such as DC blocking between arbitrary two ports, single-layer via-less structure for low-cost fabrication and convenient integration (as only one isolation resistor required) are highlighted. A 2-GHz Wilkinson microstrip power divider with a fractional bandwidth of 4% has been fabricated and experimentally characterized. The consistency between simulated and measured results validates the effectiveness of our proposed design.

Wideband Single-Layer 90$^{\circ}$ Phase Shifter Using Stepped Impedance Open Stub and Coupled-Line With Weak Coupling

2014 ◽  
Vol 24 (3) ◽  
pp. 176-178 ◽  
Author(s):  
Qiang Liu ◽  
Yuanan Liu ◽  
Junyu Shen ◽  
Shulan Li ◽  
Cuiping Yu ◽  
...  
Keyword(s):  
Weak Coupling ◽  
Phase Shifter ◽  
Single Layer ◽  
Coupled Line

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.

Multiwafer Movpe of III-Nitride Films for Led and Laser Applications

1997 ◽  
Vol 482 ◽  
Author(s):  
R. Beccard ◽  
O. Schoen ◽  
B. Schineller ◽  
D. Schmitz ◽  
M. Heuken ◽  
...  
Keyword(s):  
Room Temperature ◽  
State Of The Art ◽  
Low Cost ◽  
Free Exciton ◽  
Single Layer ◽  
Laser Applications ◽  
Room Temperature Photoluminescence ◽  
Cost Of Ownership ◽  
P Type ◽  
Better Than

AbstractProcess for mass production of GaN and its related alloys, InGaN and AlGaN, have been optimized to achieve high device yield and low cost of ownership. Here we present some of the latest results obtained from AIX 2000 HT Planetary Reactor® in a configuration of 7×2” which provides unique uniformity capabilities due to the two fold rotation of the substrates. GaiN single layers with background electron concentrations below 5·1016 cm-3 and intended doping levels up to 1018 cm-3 p-type and 1020 cm-3 n-type with state of the art homogeneities have been achieved. Thickness homogeneities have been shown to be better than 1% standard deviation on full 2” wafers, while composition uniformity of ternary material is determined by room temperature photoluminescence mappings. Low temperature photoluminescence and reflectance spectra of single layer GaN revealed free exciton transitions.

Wideband Tunable Phase Shifter With Low In-Band Phase Deviation Using Coupled Line

2018 ◽  
Vol 28 (8) ◽  
pp. 678-680 ◽  
Author(s):  
Boram An ◽  
Girdhari Chaudhary ◽  
Yongchae Jeong
Keyword(s):  
Phase Shifter ◽  
Coupled Line ◽  
Phase Deviation

scholarly journals An ANN-Based Synthesis Model for Parallel Coupled Microstrip Lines with Floating Ground-Plane Conductor and Its Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Yuan Cao ◽  
Zhongbao Wang ◽  
Shaojun Fang
Keyword(s):  
Return Loss ◽  
Phase Shifter ◽  
Bandpass Filter ◽  
Ground Plane ◽  
Mapping Technique ◽  
Microstrip Lines ◽  
Phase Velocities ◽  
Phase Deviation ◽  
Artificial Neural Network Ann ◽  
Better Than

To directly obtain physical dimensions of parallel coupled microstrip lines with a floating ground-plane conductor (PCMLFGPC), an accurate synthesis model based on an artificial neural network (ANN) is proposed. The synthesis model is validated by using the conformal mapping technique (CMT) analysis contours. Using the synthesis model and the CMT analysis, the PCMLFGPC having equal even- and odd-mode phase velocities can be obtained by adjusting the width of the floating ground-plane conductor. Applying the method, a 7 dB coupler with the measured isolation better than 27 dB across a wide bandwidth (more than 120%), a 90° Schiffman phase shifter with phase deviation ±2.5° and return loss more than 17.5 dB covering 63.4% bandwidth, and a bandpass filter with completely eliminated second-order spurious band are implemented. The performances of the current designs are superior to those of the previous components configured with the PCMLFGPC.

scholarly journals Miniaturization Design for 8 × 8 Butler Matrix Based on Back-to-Back Bilayer Microstrip

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yu Zhai ◽  
Xiaoxing Fang ◽  
Kejia Ding ◽  
Fei He
Keyword(s):  
Power Distribution ◽  
Phase Shifter ◽  
Low Cost ◽  
Phase Error ◽  
Butler Matrix ◽  
Relative Bandwidth ◽  
Indoor Wireless ◽  
The Matrix ◽  
Fixed Phase ◽  
Better Than

A low-cost, compact 8 × 8 Butler matrix based on a novel bilayer microstrip configuration is presented and implemented for 4.3 GHz telecommunication application. A back-to-back placed bilayer microstrip structure has been proposed to avoid using crossover. To expand operational bandwidth of the Butler matrix, a three-branch line directional coupler has been employed as 3 dB/90° bridge, and a kind of improved two-order Schiffman phase shifter has been adopted as fixed phase shifter. For application of indoor wireless communication, a compact broadband 8 × 8 Butler matrix has been designed and fabricated. The measured results show that the return loss of the matrix is lower than −10 dB, the isolation is better than 17 dB, the power distribution error is less than ±2.0 dB, the phase error is less than ±15°, and the relative bandwidth is more than 23%.

Kajian Model Fisik Pengaruh Freeboard dan Susunan Buis Beton Sebagai Pemecah Gelombang Tenggelam Ambang Rendah (Pegar) Dalam Mereduksi Gelombang

2017 ◽  
Vol 1 (2) ◽  
pp. 34
Author(s):  
Zulkarnain Zulkarnain ◽  
Nadjadji Anwar
Keyword(s):  
Low Cost ◽  
Relative Depth ◽  
Submerged Breakwater ◽  
Wave Flume ◽  
Concrete Cylinder ◽  
Engineering Department ◽  
Sea Area ◽  
The Waves ◽  
Transmission Test ◽  
Better Than

The Research Center and Development of Water (Puslitbang) is currently developing the Submerged Breakwater in shallow sea area (PEGAR). The author is interested to examine the material that easily obtained in the field of RCP concrete cylinder. The observation is how it to be ability in function as submerged breakwater an go green and low cost. The physical model of wave transmission test is how the response to the structure in ability to damping of wave as the breakwater function. In this research breakwater used is submerged breakwater type by using concrete cylinder (buis beton). The purpose from this research is to know how the response of breakwater structure to the waves through it, with some variation of the structure by creating a structure with three variations of the arrangement and freeboard that is the relative depth with the crest width is constant. The wave generated test in this study is using regular waves in wave flume at FTSP Civil Engineering Department of Institute Technology Ten November. From the analysis of the effect of the installation of submerged breakwater by using concrete cylinder to the wave damping value, it can be concluded that the factors that are very influential is the freeboard and the composition of concrete cylinder. Scenario A (rigid vertical massive) is capable of producing the smallest value of kt is 0.33. As for scenario B (rigid horyzontal massive) with a damping value of 0.5, while the scenario C (rigid permeable) is only able to produce kt value of 0.71. Scenario A is better than scenario B and C Because the position of arrangement of A is very good used to damp wave in small or big freeboard conditions.

Bamboo Waste-based Bio-composite Substance: An application for Low-cost Construction Materials

2020 ◽  
Vol 4 (1) ◽  
pp. 41-48
Author(s):  
Teodoro Astorga Amatosa ◽  
Michael E. Loretero
Keyword(s):  
Composite Materials ◽  
Sea Water ◽  
Raw Materials ◽  
Low Cost ◽  
Construction Materials ◽  
Single Layer ◽  
High Strength ◽  
Green Technology ◽  
Experimental Medium ◽  
Natural Treatment

Bamboo is a lightweight and high-strength raw materials that encouraged researchers to investigate and explore, especially in the field of biocomposite and declared as one of the green-technology on the environment as fully accountable as eco-products. This research was to assess the technical feasibility of making single-layer experimental Medium-Density Particleboard panels from the bamboo waste of a three-year-old (Dendrocalamus asper). Waste materials were performed to produce composite materials using epoxy resin (C21H25C105) from a natural treatment by soaking with an average of pH 7.6 level of sea-water. Three different types of MDP produced, i.e., bamboo waste strip MDP (SMDP), bamboo waste chips MDP (CMDP) and bamboo waste mixed strip-chips MDP (MMDP) by following the same process. The experimental panels tested for their physical-mechanical properties according to the procedures defined by ASTM D1037-12. Conclusively, even the present study shows properties of MDP with higher and comparable to other composite materials; further research must be given better attention as potential substitute to be used as hardwood materials, especially in the production, design, and construction usage.

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