scholarly journals A Novel Design of Parasitically Gap Coupled Patches Forming an Elliptical Patch Antenna for Broadband Performance

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Vijay Sharma
Keyword(s):  
Patch Antenna ◽  
Single Layer ◽  
The Other ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Central Frequency ◽  
Elliptical Shape ◽  
Resonant Modes ◽  
Novel Design ◽  
Layer Assembly

A novel single layer assembly of gap coupled elements in elliptical shape is proposed in this communication to achieve broadband performance. Among the five patches considered in the present assembly, two pairs of patches having different patch areas are arranged around an edge truncated elliptical patch. The central edge truncated elliptical patch is fed through an inset feed arrangement and the other patches are parasitically gap coupled to the central patch. With such an arrangement, an enhanced impedance bandwidth of 2.45 GHz (or 36.2%) with respect to central frequency 6.1 GHz is achieved. Three resonant modes are excited with this arrangement giving improved bandwidth and gain in comparison to a conventional elliptical patch antenna. The simulated radiation patterns of proposed arrangement of patches suggest that these are identical in shape and direction of maximum radiations is directed normally to assembly of patches.

scholarly journals Bandwidth and Gain Enhancement of Patch Antenna with Stacked Parasitic Strips Based on LTCC Technology

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Li Li ◽  
Yong Zhang ◽  
Jinhong Wang ◽  
Wei Zhao ◽  
Shuang Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Patch Antenna ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Antenna Radiation ◽  
Maximum Gain ◽  
Gain Enhancement ◽  
Resonant Modes ◽  
Operating Bandwidth

A compact patch antenna with stacked parasitic strips (SPSs) based on low temperature cofired ceramic (LTCC) technology is presented. By adding three pairs of SPSs above the traditional patch antenna, multiple resonant modes are excited to broaden the bandwidth. At the same time, the SPSs act as directors to guide the antenna radiation toward broadside direction to enhance the gain. The measured results show that the prototype antenna achieves an impedance bandwidth of 16% forS11<-10 dB (32.1–37.9 GHz) and a maximum gain of about 8 dBi at 35 GHz. Furthermore, the radiation patterns and gain are relatively stable within the operating bandwidth. The total volume of the antenna is only 8 × 8 × 1.1 mm3.

scholarly journals Broadband Semielliptical Patch Antenna with Semicircular Ring Slot for WiMax Application

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Brajraj Shrama ◽  
Vijay Sharma ◽  
K. B. Sharma ◽  
D. Bhatnagar
Keyword(s):  
Patch Antenna ◽  
Communication Systems ◽  
Ground Plane ◽  
Axial Ratio ◽  
Substrate Material ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Central Frequency ◽  
Practical Applications ◽  
Resonance Frequencies

This paper reports the design and analysis of a semielliptical patch antenna modified by cutting semicircular ring slot in patch geometry and obtained results are discussed. The reported antenna is designed on a multilayered substrate material having two glass epoxy FR-4 substrates separated by a thin foam substrate having thickness 1.0 mm. The size of ground plane is 75 mm×75 mm, whereas the patch dimension along major and minor axes is 23.0 mm and 14.0 mm, respectively. The two modes corresponding to resonance frequencies 3.39 GHz and 3.73 GHz are excited to provide wide impedance bandwidth 21.1% with respect to central frequency with stable radiation patterns. The antenna shows circular polarization with axial ratio bandwidth 5.5% and minimum axial ratio value 1.65 dBi. The radiation patterns of proposed antenna are normal to the surface of patch and are almost identical in shape as required for practical applications. The proposed antenna covers entire median band of WiMax communication systems ranges from 3.40 GHz to 3.6 GHz.

A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS)

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 191-199
Author(s):  
M. K. Verma ◽  
Binod K. Kanaujia ◽  
J. P. Saini ◽  
Padam S. Saini
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Feeding Technique

AbstractA broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna for further improvement in performance. Measured 10-dB impedance bandwidth (IBW) and 3-dB axial ratio bandwidth (ARBW) of the proposed antenna are 32.31 % (3.14–4.35 GHz) and 20.91 % (3.34–4.12 GHz), respectively. The gain of the antenna is varied from 3.5 to 4.86dBi within 3-dB ARBW. Measured results matched well with the simulated results.

Gain Improvement and Bandwidth Extension of Ultra-Wide Band Micro-Strip Patch Antenna Using Electromagnetic Band Gap Slots and Superstrate Techniques

2020 ◽  
Vol 17 (2) ◽  
pp. 985-989
Author(s):  
Ahmed Jamal Abdullah Al-Gburi ◽  
I. M. Ibrahim ◽  
Z. Zakaria ◽  
Aymen Dheyaa Khaleel
Keyword(s):  
Patch Antenna ◽  
Wide Band ◽  
The Other ◽  
Ultra Wide Band ◽  
Impedance Bandwidth ◽  
Cross Polarization ◽  
Bandwidth Extension ◽  
Electromagnetic Band Gap ◽  
Mobile Cellular ◽  
Achievement Gain

In this article, the ultrawideband of micro-strip patch antenna is proposed bandwidth and gain were enhanced. The techniques that using to improve the gain and bandwidth are EBG slots and superstrate. The designed structure is implemented using computer simulation technology software (CST). The achievement gain of antenna is increased by 26.4% on 10.5 GHz of frequency. While the bandwidth of the proposed antenna is increased to 161%, the range from 2.67 to 26 GHz. This range of frequency is cover UWB, GPS, 5G mobile cellular, LTE, WLAN 802.11b/g UMTS2000, WiMAX, PCS1900, TD-SCDMA and Bluetooth applications. On the other hand, the ability of the superstrate allows to smaller leverage on the cross polarization accomplishment of an antenna slots. The compares between impedance bandwidth and gain by way of like the radiation patterns are debated at competence of benefit. Finally, there are perfect harmony between simulated and fabricated results.

A novel design of Scarecrow-shaped patch antenna for broadband applications

2017 ◽  
Vol 10 (3) ◽  
pp. 351-359 ◽  
Author(s):  
Bhupendra Kumar Shukla ◽  
Nitesh Kashyap ◽  
Rajendra Kumar Baghel
Keyword(s):  
Patch Antenna ◽  
Microstrip Line ◽  
Ground Plane ◽  
Field Pattern ◽  
Impedance Bandwidth ◽  
Far Field ◽  
Tan Δ ◽  
Coaxial Feed ◽  
Far Field Pattern ◽  
Novel Design

A novel Scarecrow-shaped patch antenna has been presented for broadband applications. The proposed antenna composed of an elliptical shape radiating patch, partial ground plane, and 50 Ω microstrip line which is Boolean added with the radiating patch. To achieve wide impedance bandwidth, an elliptical notch and two rectangular-shaped parasitic slots have incorporated on the ground plane. This antenna has printed on FR-4 substrate (tan(δ) = 0.02, εr = 4.3) with the thickness of 1.6 mm. It is energized by coaxial feed which is connected with a microstrip line through via. The proposed configuration has examined numerically with the help of CST Microwave Studio and experimentally also. The broadband property of this antenna has been achieved by adjusting the dimensions of an elliptical notch. The antenna exhibits the bandwidth of 116.32% from 1.23 to 4.65 GHz for S11 <−10 dB. Current distribution and far-field pattern at resonating frequencies 1.29, 1.77, 2.28, 2.94, and 3.72 GHz have been studied. It has been found that the far-field pattern is distorted at frequency 3.72 GHz due to higher order modes. Effect of parameters on frequency response of the antenna has also been investigated to know the behavior of the antenna.

scholarly journals A Wideband Differential-Fed Microstrip Patch Antenna Based on Radiation of Three Resonant Modes

2019 ◽  
Vol 2019 ◽  
pp. 1-7 ◽  
Author(s):  
Taohua Chen ◽  
Yueyun Chen ◽  
Rongling Jian
Keyword(s):  
Patch Antenna ◽  
Free Space ◽  
Impedance Matching ◽  
Microstrip Patch Antenna ◽  
Impedance Bandwidth ◽  
Current Position ◽  
Microstrip Patch ◽  
Zero Current ◽  
Resonant Modes ◽  
Rectangular Strips

A wideband differential-fed microstrip patch antenna based on radiation of three resonant modes of TM12, TM30, and slot is proposed in this paper. Firstly, two symmetrical rectangular slots are cut on the radiating patch where the zero-current position of the TM30 mode excites another resonant slot mode. In addition, the slot’s length is enlarged to decrease the frequency of the slot mode with little effect on that of the TM30 mode. To further expand the impedance bandwidth, the width of patch is reduced to increase the frequency of the TM12 mode, while having little influence on that of the TM30 and slot modes. Moreover, a pair of small rectangular strips is adopted on the top of the feeding probes to achieve a good impedance matching. Finally, based on the arrangements above, a broadband microstrip patch antenna with three in-band minima is realized. The results show that the impedance bandwidth (Sdd11<−10 dB) of the proposed antenna is extended to 35.8% at the profile of 0.067 free-space wavelength. Meanwhile, the proposed antenna maintains a stable radiation pattern in the operating band.

scholarly journals Design and analysis of stepped reconfigurable rectangular patch antenna for LTE, vehicular and ultra wideband applications

2017 ◽  
Vol 7 (1.1) ◽  
pp. 548
Author(s):  
M Ajay Babu ◽  
B T P Madhav ◽  
G Bhargavi ◽  
V Sai Krishna ◽  
Y Hemanth Kumar Reddy ◽  
...  
Keyword(s):  
Current Distribution ◽  
Patch Antenna ◽  
Single Band ◽  
The Other ◽  
Ultra Wideband ◽  
Radiation Patterns ◽  
Average Gain ◽  
Parasitic Element ◽  
Maximum Gain ◽  
Rectangular Patch

A stepped rectangular patch antenna having partial ground loaded with parasitic element is analyzed in this article. The Proposed antenna is connected to a diode on the flip side of the structure that is in between the parasitic element and the partial ground, the two cases ON, OFF are studied and analyzed. In OFF case the antenna got rejected at 3 bands (2 to 2.3 GHz, 2.6 to 3 GHz and 5.8 to 7.9 GHz). On the other hand, in ON case antenna got rejected at single band (3.6 to 4.4 GHz). The maximum gain of 5.5 dB is observed at 7.8 GHz frequency in ON case and the maximum gain of 4.4 dB is observed at 9 GHz frequency in OFF case with an average gain of 3.3dB in ON case and 2.9dB in OFF case. The proposed antenna works in almost at all ultra wideband applications having single rejection at 3.6GHz-4GHZ.The proposed antenna E-Field, Current distribution and radiation patterns have been analyzed using CST microwave studio in this article.

scholarly journals Compact Antenna with Frequency Reconfigurability for GPS/LTE/WWAN Mobile Handset Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Lingsheng Yang ◽  
Biyu Cheng ◽  
Yongan Zhu ◽  
Yajie Li
Keyword(s):  
Radiation Efficiency ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Antenna Gain ◽  
Radiation Patterns ◽  
Rf Switch ◽  
Compact Antenna ◽  
Resonant Modes ◽  
Mobile Handset ◽  
Frequency Reconfigurable Antenna

A compact frequency reconfigurable antenna for mobile handset application is proposed in this paper. The antenna consists of an inverted L-shaped feeding strip, a shorter grounded strip, and a longer grounded strip which is connected with four inductors by using a single-pole four-throw RF switch. When we change the working states of the RF switch, the corresponding inductor is connected with the long grounded strip and different resonant modes of the antenna can be realized. The measured −6 dB impedance bandwidth of the presented antenna is 683–960 MHz and 1460–2820 MHz, which is able to cover the LTE700/GSM850/900 and GPS/DCS1800/PCS1900/UMTS2100/LTE2300/2500 bands. The antenna gain, radiation efficiency, and radiation patterns are also described in the paper.

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