scholarly journals Microstrip-Fed Circular Disc Monopole Antenna with Defected Waveguide Structure

2018 ◽  
Vol 8 (1) ◽  
pp. 189 ◽  
Author(s):  
S. J. Chin ◽  
M. Z. A. Abd. Aziz ◽  
M. R. Ahmad
Keyword(s):  
Return Loss ◽  
Waveguide Structure ◽  
Monopole Antenna ◽  
Circular Disc ◽  
Inner Surface ◽  
Parametric Studies ◽  
Low Efficiency ◽  
Cst Microwave Studio

This paper presented the microstrip-fed circular disc monopole antenna with defected waveguide structure. First, the microstrip-fed circular disc monopole antenna was designed. Next, the monopole antenna was designed with waveguide and lastly followed by the defected waveguide structure where the uniplanar compact (UC) structure was used. CST Microwave studio software was used for simulation and parametric studies process. Initially, the microstrip-fed circular disc monopole antenna was designed to achieve return loss less than -10dB for wideband frequencies. Then, the gain and directivity was improved with the integration of waveguide. The highest directivity of 11.38dBi found at 13.5GHz. However, low efficiency and narrower bandwidth were obtained. Next, uniplanar compact defected waveguide structure (UC DWS) was designed at inner surface of waveguide. The bandwidth achieved 3.09GHz where it covered from 10.91GHz to 14GHz. Meanwhile, the directivity maintained higher than the monopole antenna with highest directivity of 8.84dBi at 10GHz. The gain was also improved from 11GHz to 14GHz with highest gain of 6.38dB occurred at 13.5GHz.

scholarly journals Design of Monopole Antenna Based on Fractal Geometry

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Zhao Yuanqing ◽  
Qiu Jinghui ◽  
Wang Wei
Keyword(s):  
Fractal Geometry ◽  
Monopole Antenna ◽  
Circular Disc ◽  
Portable Devices ◽  
Good Consistency ◽  
Cst Microwave Studio

This paper presents a circular disc monopole antenna based on fractal geometry. The antenna is designed to be applied in UWB systems. So it is essential to ensure that the bandwidth of the antenna ranges from 3.1 GHz to 10.6 GHz, that is, IEEE 802.15.3a. However, the proposed antenna has achieved working in the required bandwidth. Compared to the antennas illustrated in most similar literatures, the proposed antenna has a much smaller size, which makes the antenna possible to be integrated with portable devices. Firstly, the antenna was designed through CST Microwave Studio. Then, the antenna was fabricated according to the simulated results. At last, the comparison between the simulated results and measured results was carried out which demonstrated good consistency.

Analysis of monopole antenna on circular disc by mode matching

2001 ◽  
Vol 18 (2) ◽  
pp. 185-187
Author(s):  
Baohua Sun ◽  
Fushun Zhang ◽  
Qizhong Liu
Keyword(s):  
Monopole Antenna ◽  
Circular Disc ◽  
Mode Matching

scholarly journals DESAIN ANTENA MIKROSTRIP UNTUK ALTERNATIF ANTENA SIDEBAND DVOR (DOPPLER VHF OMNIDIRECTIONAL RANGE)

2020 ◽  
Vol 5 (1) ◽  
pp. 50-58
Author(s):  
Totok Warsito ◽  
Yuyun Suprapto ◽  
Margono Margono ◽  
Romma Diana
Keyword(s):  
Return Loss ◽  
Cst Microwave Studio

Antena merupakan salah satu perangkat penting yang ada pada sistem navigasi Doppler VOR (DVOR). Saat ini pengembangan antena dengan biaya produksi rendah menjadi salah satu alternatif tujuan para peneliti. Salah satu teknologi yang banyak digunakan sebagai solusinya adalah antena berbasis mikrostrip. Sebab antena berbasis mikrostrip menawarkan biaya produksi yang sangat rendah dibandingkan dengan jenis antena lain. Antena yang dipakai pada sistem DVOR saat ini adalah antena Alford Loop. Pada penelitian ini dilakukan perancangan antena mikrostrip rectangular dengan pencatuan coaxial sebagai alternatif antena DVOR yang bekerja pada frekuensi VHF (frekuensi 108-118 MHz), sehingga hal ini memungkinkan biaya produksi yang lebih murah dibandingkan antenna Alford Loop pada umumnya. Perancangan dan simulasi antena dilakukan menggunakan software CST Microwave Studio menggunakan material FR-4 dengan konstanta dielektrik (). Hasil perancangan dan simulasi antena menunjukkan return loss (S11) sebesar -16.1 dB dan gain sebesar 4 dB pada frekuensi 113 MHz. Dari hasil simulasi juga dapat diketahui bahwa memiliki polarisasi linier horizontal dan polaradiasi yang bersifat omni-directional.

scholarly journals Monopole Antenna with Modify Ground Plane

2012 ◽  
Vol 1 (3) ◽  
pp. 266 ◽  
Author(s):  
Kamal raj Singh Rajoriya ◽  
P.K. Singhal
Keyword(s):  
Return Loss ◽  
Ground Plane ◽  
Monopole Antenna

This paper presents on modified the ground plane of monopole antenna with varying the shape and length. Basically the length of ground plane of monopole antenna is equal and greater than ?/4. Here analyzed a different ground plane of monopole antenna that is provided an efficient bandwidth with sufficient return loss.

scholarly journals Printed UWB Antenna with Coupled Slotted Element for Notch-Frequency Function

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
X. L. Bao ◽  
M. J. Ammann
Keyword(s):  
Parametric Study ◽  
Return Loss ◽  
Measured Data ◽  
Monopole Antenna ◽  
Frequency Function ◽  
Uwb Antenna ◽  
Printed Monopole Antenna ◽  
Printed Monopole ◽  
Slotted Plate

A novel printed monopole antenna employing a slotted-plate, which is electromagnetically coupled to the microstrip-fed planar element, is proposed to provide notch-frequency function. This technique enables stopband characteristics with improved control, compared to placing the slot in the microstrip-fed element. A detailed investigation of the rejectband properties has been made for the UWB antenna. Measured data for the optimized case show the 10 dB return loss bandwidth to be 9.8 GHz (from 2.80 GHz to 12.60 GHz) with a notchband frequency from 5.15 GHz to 5.825 GHz. Propagation measurements indicate that the electromagnetically coupled slot provides a greater reduction in stopband gain for the three principal planes, compared to placing the slot in the fed element. This is desirable to mitigate interference from WLAN systems. A full parametric study of the antenna is presented.

Analysis and Design of a Multi Octave Circularly Polarized Monopole Antenna for UWB, X and Ku-Band Applications

2018 ◽  
Vol 7 (3.4) ◽  
pp. 80
Author(s):  
Saritha Vanka ◽  
Tanmayi Seedrala ◽  
Jhansi Rani Areti
Keyword(s):  
Return Loss ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Frequency Region ◽  
Monopole Antenna ◽  
Impedance Bandwidth ◽  
Good Correspondence ◽  
Circularly Polarized ◽  
Analysis And Design ◽  
Ku Band

This work presents a circularly polarized, CPW-Fed multi band operating monopole antenna. The monopole antenna consists of three parasitic elements, along with a stub at ground for impedance matching. The parasitic elements so far accumulated have shown their excellence in increasing the impedance bandwidth over the 6-18GHz band. The antenna was carved on FR-4 epoxy substrate which result a copper clad laminated structure. The CPW-Fed monopole antenna exhibits excellent circular polarization levels in the frequency region 6-18GHz. The simulation resulted a Return loss of less than -10dB, with good axial ratio less than -3dB over entire band of interest. The simulation was carried out through HFSS microwave studio. The antenna measured values are in good correspondence to the simulated values. 

Printed circular disc monopole antenna for ultra-wideband applications

2004 ◽  
Vol 40 (20) ◽  
pp. 1246 ◽  
Author(s):  
J. Liang ◽  
C.C. Chiau ◽  
X. Chen ◽  
C.G. Parini
Keyword(s):  
Monopole Antenna ◽  
Circular Disc ◽  
Ultra Wideband

scholarly journals Design and Simulation of Spoon Shaped Antenna using DGS

2019 ◽  
Vol 9 (2) ◽  
pp. 2257-2259
Keyword(s):  
Return Loss ◽  
Antenna Design ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Antenna Structure ◽  
Comparison Results ◽  
Wireless Application ◽  
Cst Microwave Studio

A planer spoon shaped antenna with defected ground structure (DGS) is designed and fabricated for wireless application. The proposed antenna design exhibits 1.6GHz bandwidth, 2.20dBi Avg. Gain and maximum return loss of -24.5dB, which offers better results in wideband application. The Proposed antenna structure is simulated by software CST MWS (CST Microwave Studio) version 2018 and later comparison results are also presented

scholarly journals A Compact ACS-Fed Tri-band Microstrip Monopole Antenna for WLAN/WiMAX Applications

2018 ◽  
Vol 7 (5) ◽  
pp. 87-93 ◽  
Author(s):  
D. Kahina ◽  
C. Mouloud ◽  
D. Mokrane ◽  
M. Faiza ◽  
A. Rabia
Keyword(s):  
Radiation Pattern ◽  
Return Loss ◽  
Simple Structure ◽  
Ground Plane ◽  
Monopole Antenna ◽  
Radiation Patterns ◽  
Total Size ◽  
Resonant Frequencies ◽  
Compact Size ◽  
Microstrip Monopole Antenna

This paper proposes a novel small asymmetric coplanar strip (ACS) fed tri-band monopole antenna for WLAN and WiMAX applications. To tune and create multiple resonant frequencies, the exciting strip of monopole antenna is connected to two different arms which are a J-shaped directed toward the asymmetric ground plane and an open stub. The proposed monopole antenna with a total size of 14.6 x17.5 mm2 is fabricated and tested. The measured results indicate that the antenna has impedance bandwidths for 10-dB return loss reach about 500 MHz (2.01-2.52 GHz), 230 MHz (3.48-3.71 GHz) and 1.2GHz (5.59-6.72 GHz) which cover widely the 2.4/5.8 GHz WLAN bands and the 3.5GHz WiMAX band. The simulated radiation patterns of the proposed antenna at the three resonant frequencies have a dipole-like radiation pattern in both E-and H-Planes. The compact size, the simple structure and good radiation performances of the proposed antenna makes it well-suited forthe intended applications.

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