Investigations on the Microstripline-Fed Wide-Slot Antennas for Wideband Applications

2019 ◽  
pp. 56-102
Author(s):  
Krishnendu Chattopadhyay ◽  
Sekhar Ranjan Bhadra Chaudhuri
Keyword(s):  
Experimental Studies ◽  
Microstrip Antennas ◽  
Magnetic Surface ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Dual Frequency ◽  
Slot Antennas ◽  
Available Bandwidth ◽  
Bandwidth Enhancement ◽  
Radiation Properties

Microstrip patch antennas are printed antennas that find suitability because they are lightweight, low volume, thin in profile, dual frequency, and dual polarization operation, and compatible with MMIC. The objective of chapter is to exhibit the investigations on the bandwidth enhancement of microstrip antennas with special reference to microstrip-line-fed wide-slot antennas. Performances are realized and validated through experimental studies on the impedance properties by VNA and radiation properties by pattern measurement setup. An innovative method for the design of hexagonal wide-slot antenna has been proposed considering it as an equivalent magnetic surface of monopole antenna. Impedance bandwidth of the above slot antenna is enhanced through various tuning stubs. In case of forklike tuning stub, the obtained bandwidth is about 900MHz, for hexagonal stub the available bandwidth is 1751MHz. Further improvement in bandwidth is proposed through rotation of hexagonal wide slot, results in wide bandwidth of 5165 MHz covering all the WLAN and WiMAX applications.

Design of a bandwidth enhanced hybrid slot loop antenna for GSM/UWB standards

Circuit World ◽  
2017 ◽  
Vol 43 (3) ◽  
pp. 105-110 ◽  
Author(s):  
Partibane B. ◽  
Gulam Nabi Alsath M. ◽  
Kalidoss Rajakani
Keyword(s):  
Loop Antenna ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Slot Antennas ◽  
Content Type ◽  
Bandwidth Enhancement ◽  
Microstrip Patch ◽  
Resonant Modes ◽  
Patch Load ◽  
Patch Loading

Purpose This paper aims to presents the bandwidth enhancement of a hybrid slot–loop antenna using a modified feed structure. Design/methodology/approach The conventional monopole feed of the hybrid slot–loop radiator is loaded with a flat microstrip patch to excite higher-order modes. The proposed antenna combines the resonant modes of the slot antenna, the loop antenna and the patch loading. Findings The antenna exhibits a dual-band response suitable for GSM 1800/1900 and ultrawideband (UWB) standards. The impedance bandwidth extends from 1.65 to 1.95 GHz (11.42 per cent) and 3 to 11.1 GHz (114.9 per cent). The proposed antenna has the smallest footprint with a peak gain of 5.07 dBi at 1.8 GHz and 4.97 dBi at 6 GHz. The prototype antenna is fabricated and the simulation results are validated using experimental measurements. The performance of the bandwidth-enhanced hybrid slot–loop antenna is compared with that of other slot antennas. Originality/value Thus, a hybrid slot–loop antenna with an enhanced bandwidth has been reported in this study. The conventional monopole feed of the antenna is replaced with a monopole ending with a microstrip patch load. The antenna covers the operating bands of GSM 1800/1900 and UWB. The proposed antenna has a smaller footprint compared with other wide-slot antennas reported in the literature.

scholarly journals Wideband Printed Wide-Slot Antenna with Fork-Shaped Stub

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 347 ◽  
Author(s):  
Ke Li ◽  
Tao Dong ◽  
Zhenghuan Xia
Keyword(s):  
Wireless Communication ◽  
Communication Systems ◽  
Slot Antenna ◽  
Wireless Communication Systems ◽  
Impedance Bandwidth ◽  
Frequency Range ◽  
Slot Antennas ◽  
Resonance Technique ◽  
Operating Frequency Range ◽  
Measured Impedance

This paper presents a multiple-resonance technique that sought to achieve a wide bandwidth for printed wide-slot antennas with fork-shaped stubs. By properly appending an extra fork-shaped stub onto the main fork-shaped stub, the impedance bandwidth was able to be clearly broadened. To validate this technique, two designs where the extra stubs were added at different positions of the main stub were constructed. The measured impedance bandwidths of the proposed antennas reached 148.6% (0.9–6.1 GHz) for S11 < −10 dB, indicating a 17.9% wider bandwidth than that of the normal antenna (0.9–4.3 GHz). Moreover, a stable radiation pattern was observed within the operating frequency range. The proposed antennas were confirmed to be much-improved candidates for applications in various wireless communication systems.

scholarly journals Bandwidth Enhancement of Substrate Integrated Waveguide Cavity-backed Bow-tie-complementary-ring-slot Antenna using a Shorted-via

2018 ◽  
Vol 68 (2) ◽  
pp. 197 ◽  
Author(s):  
Arvind Kumar ◽  
S. Raghavan
Keyword(s):  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Substrate Integrated Waveguide ◽  
Radiation Characteristics ◽  
New Approach ◽  
Bandwidth Enhancement ◽  
The Individual ◽  
Better Than ◽  
Bow Tie ◽  
Good Agreement

In this study, a planar cavity-backed bow-tie-complementary-ring-slot antenna is proposed, and a new approach for bandwidth enhancement using a shorted-via is introduced. A shorted-via concept overcomes the narrow impedance bandwidth of a conventional substrate integrated waveguide cavity-backed antenna. By adjusting the location of the shorted-via (placed just above the centroid of the radiating slot), the individual bandwidth of the lower and higher order resonances has been tuned below -10 dB criterion, which results in the broadening of the bandwidth. Finally, the antenna is proficient to operate for an impedance bandwidth of 15.71 per cent, ranging from 12.02~14.07 GHz. The proposed antenna shows a gain of better than 4 dBi within the operating band with less than 0.5 dBi variation. Moreover, the antenna preserves good radiation characteristics, which is similar to that of the conventional metallic counterpart. To validate the simulated results, an antenna is fabricated and tested. The simulated results in terms of the reflection coefficient, gain, and radiation patterns are in good agreement with the measured results.

scholarly journals Dual-Band Dielectric Resonator Antenna for C and X Band Application

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Deepak Batra ◽  
Sanjay Sharma ◽  
Amit Kumar Kohli
Keyword(s):  
Dielectric Resonator ◽  
Dual Band ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Antenna Structure ◽  
Ansoft Hfss ◽  
Radiation Properties ◽  
Slot Size ◽  
Antenna Polarization

The proposed technique combines a slot antenna and a dielectric resonator antenna (DRA) to effectively design a dual band dielectric resonant antenna without compromising miniaturization or its efficiency. It is observed that the resonance of the slot and that of the dielectric structure merged to achieve extremely wide bandwidth over which the antenna polarization and radiation pattern are preserved. Here the effect of slot size on the radiation performance of the DRA is studied. The antenna structure is simulated using two simulators (Ansoft HFSS and CST-Studio software). The simulated results are presented and compared with the measured results. This DRA has a gain of 6 dBi and 5.5 dBi at 6.1 and 8.3 GHz, respectively, 10 dB return impedance bandwidth of nearly 4% and 6% at two resonating frequencies and 98% efficiency has been achieved from the configuration. It is shown that the size of the slot can significantly affect the radiation properties of the DRA, and there are good agreements between simulation and measured results.

A CPW-fed stepped slot UWB antenna for MIMO/diversity applications

2015 ◽  
Vol 9 (1) ◽  
pp. 151-162 ◽  
Author(s):  
Raj Kumar ◽  
Neha Pazare
Keyword(s):  
Coplanar Waveguide ◽  
Impedance Matching ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Uwb Antenna ◽  
Slot Antennas ◽  
Capacity Loss ◽  
Field Radiation

An ultra-wideband (UWB) slot antenna for diversity applications is introduced. The overall structure of the antenna consists of two similar coplanar waveguide (CPW)-fed stepped rectangular slots placed in an orthogonal position. The slots are asymmetric with respect to their placement in the ground plane. The CPW feeds are double stepped and terminated on hexagonal patches for better impedance matching. A wide impedance bandwidth (measured) from 3 to 12 GHz with an isolation better than 15 dB is obtained with this antenna. To improve the isolation, the design is modified and an I-shaped slot strip is introduced between the two slot antennas. With this, the isolation is brought about 25 dB of most of the band, while the impedance bandwidth remains the same (2.8–12 GHz for port 1, measured and 2.9–12 GHz for port 2, measured). The far-field radiation patterns are also measured and a peak gain of about 5 dBi is obtained. Finally, the diversity parameters such as envelope correlation coefficient and capacity loss are calculated and found to have low values. The antenna is expected to be useful for UWB diversity applications with good isolation.

scholarly journals Bandwidth Enhancement of Square Microstrip Antennas Using Dual Feed Line Techniques

2021 ◽  
pp. 60-65
Author(s):  
Syah Alam ◽  
◽  
Indra Surjati ◽  
Teguh x Teguh Firmansyah
Keyword(s):  
Radiation Pattern ◽  
Axial Ratio ◽  
Microstrip Antennas ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
Bandwidth Enhancement ◽  
Bandwidth Optimization ◽  
Feed Line ◽  
Directional Radiation ◽  
Simulation Results

This study proposes a new design of wide bandwidth microstrip antennas using dual feed line techniques. To obtain the optimal impedance bandwidth (IBW) and Axial Ratio Bandwidth (ARBW), several iterations were performed by controlling the dimensions and length of the dual feed line. From the simulation results, the proposed antenna obtained IBW of 0.4GHz or 17% and ARBW of 0.38GHz or 15% at an operating frequency of 2.5 GHz. The gain of the proposed antenna was 5.73dB with a directional radiation pattern. The dual feedline technique successfully improved IBW up to 254.16% compared with the single feed technique. This study would be useful especially for bandwidth optimization of microstrip antennas.

scholarly journals DESIGN OF A WIDE SLOT ANTENNA FOR BANDWIDTH ENHANCEMENT

2012 ◽  
pp. 84-86
Author(s):  
JUGAL DESAI ◽  
HITESH DHOLAKIYA ◽  
NARESH PATEL
Keyword(s):  
Return Loss ◽  
Experimental Results ◽  
Slot Antenna ◽  
Operating Frequency ◽  
Impedance Bandwidth ◽  
Bandwidth Enhancement ◽  
Operating Bandwidth

Microstrip printed wide slot antenna with a fork like tuning stub for bandwidth enhancement is proposed in this paper. By applying fork like tuning stub to the microstrip wide slot antenna instead of line feed, it is experimentally found that operating bandwidth can be enhanced. Experimental results indicate that the impedance bandwidth, defined by -10dB return loss, of the proposed wide slot antenna can reach operating bandwidth of 3.1 GHz at operating frequency about 2 GHz which is 6 times greater than conventional wide slot antenna.

Survey of various bandwidth enhancement techniques used for 5G antennas

2021 ◽  
pp. 1-21
Author(s):  
Tapan Nahar ◽  
Sanyog Rawat
Keyword(s):  
High Speed ◽  
Side Lobe ◽  
High Gain ◽  
Microstrip Antennas ◽  
Low Latency ◽  
Wave Band ◽  
High Definition ◽  
Available Bandwidth ◽  
Bandwidth Enhancement ◽  
Fifth Generation

Abstract Fifth-generation technology is not fully deployed in the world wireless communication till date. Millimeter-wave (mm-wave) band needs to be used due to plenty of available bandwidth and for achieving the goals of 5G such as greater data rate, ultra-high-speed video broadcasting, low latency services, and many more. Wideband antenna is required for 5G applications to access the high speed, low latency Internet services, and ultra-high-definition video streaming. Various bandwidth enhancement techniques have been reported by the researchers for microstrip antennas operating at microwave bands. High link losses, small wavelength, limited coverage, and environmental losses are the major challenges of mm-wave band. To mitigate these issues and satisfy 5G standard, an antenna with wide bandwidth, high gain, narrow steerable beam, high isolation, low side lobe levels, and multiband characteristics is required. Modifications in conventional antenna design techniques are required to achieve broader bandwidth along with stable radiation characteristics, improved gain, and low side lobe levels at mm-wave frequencies. This paper presents the survey of various bandwidth enhancement techniques which has been used in the 5G antennas designed by researchers. Reviews of some wideband 5G antennas with their performance comparisons are also discussed.

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