scholarly journals A Novel Microstrip-to-Microstrip Vertical Via Transition in X-Band Multilayer Packages

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
M. X. Yu
Keyword(s):  
Return Loss ◽  
Impedance Matching ◽  
Wide Band ◽  
Circuit Modeling ◽  
Loss Reduction ◽  
Equivalent Circuit Modeling ◽  
X Band ◽  
The Right ◽  
Multilayer Substrate ◽  
Better Than

This paper investigates a novel X-band microstrip-to-microstrip vertical via transition with matching pads loaded signal via. This design has been proposed for a multilayer substrate package. The matching pads, which are located in the center of the signal via on each ground layer, are adopted to further improve the impedance matching level and thus attain better signal transition performance. A physics-based equivalent circuit modeling approach has been employed for this research. The right angle MS-to-MS via transition was also designed using this technique. The simulatedS-parameters indicate that the match-pad design made a breakthrough in achieving an approximate −15 dB wide-band return loss reduction. The measuredS-parameter of MS-to-MS transition showed that return loss with the matching pads is better than that without the matching pads.

A wideband right-angle transition between thin substrate integrated waveguide and rectangular waveguide based on multi-section structure

2015 ◽  
Vol 8 (2) ◽  
pp. 185-191 ◽  
Author(s):  
Teng Li ◽  
Wenbin Dou
Keyword(s):  
Insertion Loss ◽  
Rectangular Waveguide ◽  
Return Loss ◽  
Impedance Matching ◽  
Experimental Results ◽  
Center Frequency ◽  
Substrate Integrated Waveguide ◽  
Rectangular Aperture ◽  
Section Structure ◽  
Better Than

In this paper, a novel wideband right-angle transition between thin substrate integrated waveguide (SIW) and rectangular waveguide (RWG) based on multi-section structure operating at center frequency 31.5 GHz is presented. A multi-section SIW with a rectangular aperture etched on the broad wall and two stepped ridges embedded in the RWG flange are introduced to obtain a wide impedance matching. The simulations show that the bandwidth with return loss better than 20 dB is about 17 GHz. In order to verify our designs, two back-to-back transitions with different lengths are fabricated and measured. The experimental results agree well with simulations. The proposed component shows an insertion loss less than 0.44 dB and a return loss better than 14.5 dB over 12.15 GH, which corresponds to 38.57% bandwidth.

Multi-Edged Wide-Band Rectangular Microstrip Fractal Antenna Array for C- and X-Band Wireless Applications

2016 ◽  
Vol 26 (04) ◽  
pp. 1750068 ◽  
Author(s):  
Jaspal Singh Khinda ◽  
Malay Ranjan Tripathy ◽  
Deepak Gambhir
Keyword(s):  
Return Loss ◽  
Low Cost ◽  
Ground Plane ◽  
Wide Band ◽  
Impedance Bandwidth ◽  
Network Analyzer ◽  
Fractal Antenna ◽  
Wireless Applications ◽  
X Band ◽  
Wide Range

A low-cost multi-edged rectangular microstrip fractal antenna (RMFA) yielding a huge bandwidth of 8.62[Formula: see text]GHz has been proposed in this paper. The proposed fractal antenna design constitutes a radiation patch, fed with 50[Formula: see text][Formula: see text] microstrip line and a partial ground plane. The partial ground plane is the combination of shapes of rectangle and three-point arc. The proposed antenna is simulated as well as fabricated. The simulated results using electromagnetic solver software and measured with vector network analyzer bench MS46322A are presented and compared. The various parameters such as return loss, voltage standing wave ratio (VSWR), antenna impedance, gain, directivity, group delay and phase of [Formula: see text], radiation efficiency and patterns are presented here. The depth of return loss is improved for a wide range of frequencies. The proposed fractal antenna is further extended to linear array to improve the gain and impedance bandwidth. The simulated and measured results prove the superiority of the proposed antenna.

scholarly journals A design of wideband high-power 3-dB quadrature coupler using defected ground structure for status data transmitting system

2020 ◽  
Vol 9 (1) ◽  
pp. 198-204
Author(s):  
The Anh Nguyen Dinh ◽  
Long Hoang Duc ◽  
Duong Bach Gia ◽  
Dragos Dancila
Keyword(s):  
High Power ◽  
Return Loss ◽  
Wide Band ◽  
Harmonic Suppression ◽  
Frequency Range ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
The Status ◽  
Status Data ◽  
Better Than

The paper presents a wideband 3-dB quadrature coupler designed for operation at 2 GHz. The presented coupler is based on a broadside-coupled suspended structure in combination with a proposed defected ground structure (DGS) allowing for high power, wide-band and improved harmonic suppression performance. The experimental results show 0.2 dB of insertion loss, return loss of better than 18 dB and isolation of better than 25 dB in the frequency range from 1.74 to 2.67 GHz. The proposed coupler is able to be integrated in the status data transmitting system, which is suitable for vessel monitoring. The fundamental characteristics of the implemented coupler have been measured and verified.

scholarly journals Guard lines conformal slotted antenna array for multiband application

2021 ◽  
Vol 10 (2) ◽  
pp. 140
Author(s):  
Brajlata Chauhan ◽  
Suresh Chandra Gupta ◽  
Sandip Vijay
Keyword(s):  
Antenna Array ◽  
Impedance Matching ◽  
Surface Current ◽  
Wide Band ◽  
Rectangular Slot ◽  
Conformal Antenna ◽  
Current Path ◽  
Quarter Wavelength ◽  
X Band ◽  
Good Agreement

<span>This work investigated a miniaturized slotted conformal antenna array for multiband application. Three guard lines are incorporated to the side of main patch and top of main patch to reduce surface current for planner surface and observe the effect of guard line due to which it resonate at three frequencies in X band and Ku band to be useful for multiband. A rectangular slot is etched at center of patches to increase the current path for wide band application. A quarter wavelength feeding network is used with good agreement of impedance matching. The main lobe width and direction shows through the radiation pattern which remains stable even it is significantly curved. This structure is wrapped around a cylinder with a diameter of 41.4 mm in the circumferential direction. It is observed that the planner antenna array operating at 8.4 GHz, 11.2 GHz &amp;18.2 GHz with a return loss of -20 dB to -45 dB with fractional BW of 25% at 3rd frequency range and the directivity from 3.4 dBi-6.8 dBi. By doing some alteration in dimensions for the conformal antenna producing fractional BW of 20% and the directivity 5.5 to 9.1 dBi at resonating frequencies of 8.4 GHz, 11.4 GHz, and 17.5 GHz. This proposed array is simulated on CST software.</span>

scholarly journals Design of a Circularly Polarized Galileo E6-Band Textile Antenna by Dedicated Multiobjective Constrained Pareto Optimization

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Arnaut Dierck ◽  
Frederick Declercq ◽  
Thomas Vervust ◽  
Hendrik Rogier
Keyword(s):  
Return Loss ◽  
Impedance Matching ◽  
Real Life ◽  
Axial Ratio ◽  
Wide Band ◽  
Design Strategy ◽  
Pareto Optimization ◽  
Smart Textile ◽  
Textile Antenna ◽  
Materials Used

Designing textile antennas for real-life applications requires a design strategy that is able to produce antennas that are optimized over a wide bandwidth for often conflicting characteristics, such as impedance matching, axial ratio, efficiency, and gain, and, moreover, that is able to account for the variations that apply for the characteristics of the unconventional materials used in smart textile systems. In this paper, such a strategy, incorporating a multiobjective constrained Pareto optimization, is presented and applied to the design of a Galileo E6-band antenna with optimal return loss and wide-band axial ratio characteristics. Subsequently, different prototypes of the optimized antenna are fabricated and measured to validate the proposed design strategy.

scholarly journals Logarithmic Slots Antennas Using Substrate Integrated Waveguide

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Jahnavi Kachhia ◽  
Amit Patel ◽  
Alpesh Vala ◽  
Romil Patel ◽  
Keyur Mahant
Keyword(s):  
Dielectric Constant ◽  
High Frequency ◽  
Return Loss ◽  
High Gain ◽  
Substrate Integrated Waveguide ◽  
High Frequency Structure Simulator ◽  
High Gain Antenna ◽  
X Band ◽  
New Generation ◽  
Better Than

This paper represents new generation of slotted antennas for satellite application where the loss can be compensated in terms of power or gain of antenna. First option is very crucial because it totally depends on size of satellite so we have proposed the high gain antenna creating number of rectangular, trapezoidal, and I shape slots in logarithm size in Substrate Integrated Waveguide (SIW) structure. The structure consists of an array of various shape slots antenna designed to operate in C and X band applications. The basic structures have been designed over a RT duroid substrate with dielectric constant of 2.2 and with a thickness of 0.508 mm. Multiple slots array and shape of slot effects have been studied and analyzed using HFSS (High Frequency Structure Simulator). The designs have been supported with its return loss, gain plot, VSWR, and radiation pattern characteristics to validate multiband operation. All the proposed antennas give gain more than 9 dB and return loss better than −10 dB. However, the proposed structures have been very sensitive to their physical dimensions.

scholarly journals Fully Integrated High Gain S-Band Triangular Slot Antenna for CubeSat Communications

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 156
Author(s):  
Mohamed El Bakkali ◽  
Moulhime El Bekkali ◽  
Gurjot Singh Gaba ◽  
Josep M. Guerrero ◽  
Lavish Kansal ◽  
...  
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Impedance Matching ◽  
Electronic Devices ◽  
Wide Band ◽  
High Gain ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Fully Integrated ◽  
Low Profile

Among other CubeSat subsystems, Antenna is one of the most important CubeSat components as its design determines all the telecommunication subsystems’ performances. This paper presents a coplanar wave-guide (CPW)-fed equilateral triangular slot antenna constructed and analyzed for CubeSat communications at S-band. The proposed antenna alone presents high gain and ultra-wide band while its radiation pattern is bidirectional at an unlicensed frequency of 2450 MHz. The objective is to use the CubeSat chassis as a reflector for reducing the back-lobe radiation and hence minimizing interferences with electronic devices inside the CubeSat. This leads to a high gain of 8.20 dBi and a unidirectional radiation pattern at an industrial, scientific and mdical (ISM) band operating frequency of 2450 MHz. In addition to that, the presented antenna is low-profile and exhibits high return loss, ultra-wide impedance bandwidth, and good impedance matching at 2450 MHz.

scholarly journals Wideband Cylindrical Dielectric Resonator Antenna Operating in HEM11δ Mode with Improved Gain: A Study of Superstrate and Reflector Plane

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Sounik Kiran Kumar Dash ◽  
Taimoor Khan ◽  
Binod Kumar Kanaujia ◽  
N. Nasimuddin
Keyword(s):  
Dielectric Resonator ◽  
Impedance Matching ◽  
Wide Band ◽  
High Gain ◽  
Dielectric Resonator Antenna ◽  
Gain Enhancement ◽  
Transparent Dielectric ◽  
Single Side ◽  
X Band ◽  
First Time

A wideband and high gain dielectric resonator antenna (DRA) operating in hybrid HEM11δ mode is proposed. The investigated geometry employs one cylindrical dielectric resonator partially covered with a transparent dielectric superstrate and backed up by a single side metal coated dielectric reflector plane. The reflector is dedicated for gain enhancement while the superstrate is employed for merging of two resonant bands resulting in a single wide band. The dielectric resonator is excited by simple microstrip feed slot coupling technique and operates over X-band, ranging from 7.12 GHz to 8.29 GHz, that is, of 15.18% impedance matching bandwidth with 11.34 dBi peak gain. The different development stages like standalone DRA, DRA with superstrate, DRA with reflector, and DRA with both superstrate and reflector plane with respect to bandwidth and gain performances are analyzed properly. To the best of authors’ knowledge, this is the first time this type of combination of both superstrate and reflector plane is demonstrated in DRA engineering. An antenna prototype was fabricated and characterized and a very good agreement is achieved between the simulated and measured results.

scholarly journals Compact Ultra-Wideband Phase Inverter Using Microstrip-CPW-Slotline Transitions

Electronics ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 252
Author(s):  
Wahab Mohyuddin ◽  
Gwan Hui Lee ◽  
Dong Sik Woo ◽  
Hyun Chul Choi ◽  
Kang Wook Kim
Keyword(s):  
Return Loss ◽  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ultra Wideband ◽  
Frequency Bandwidth ◽  
Microwave Frequencies ◽  
Phase Inverter ◽  
Field Transformation ◽  
Phase Deviation ◽  
Better Than

A planar ultra-wideband phase inverter, which consists of a series of transitions between microstrip, coplanar waveguide, and slotline, is designed and implemented. This compact-sized phase inverter can be used to generate wideband 180° phase differential signals, especially at high microwave frequencies up to millimeter-waves. The design is based on the impedance matching and smooth field transformation between the transitional stages. The fabricated transition has dimensions of 7.36 mm × 5.08 mm, and provides ultra-wide frequency bandwidth from 13 GHz to 38 GHz with low insertion loss of better than 2 dB within ±5° phase deviation and with return loss of greater than 10 dB.

Design of a Miniaturized Microstrip Wilkinson Power Divider

2013 ◽  
Vol 303-306 ◽  
pp. 1826-1829
Author(s):  
Xiao Tao Cai ◽  
De Jiang Yu ◽  
Hui Feng Wang ◽  
Ru Gang Hu
Keyword(s):  
Frequency Band ◽  
Return Loss ◽  
Impedance Matching ◽  
Power Divider ◽  
Wilkinson Power Divider ◽  
Operation Frequency ◽  
Better Than ◽  
Good Agreement

A miniaturized microstrip Wilkinson power divider is proposed in this paper. The designed power divider is miniaturized by means of using the snake-shaped structure to meet the engineering requirements. During the operation frequency band, the designed Wilkinson power divider has good performance of impedance matching at three ports and the measured return loss of each port are all less than -17dB. The isolation between two output ports is better than -20dB. The insert loss is less than 0.7dB. The designed power divider is fabricated to validate the design. The proposed power divider is measured and the simulated and measured results have a good agreement.

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