Analysis and design of multi-sector monopole Yagi-Uda array mounted on a ground plane using moment method

Author(s):  
T. Maruyama
Author(s):  
Sonal Gupta ◽  
Shilpee Patil ◽  
Chhaya Dalela ◽  
Binod Kumar Kanaujia

Abstract Design of single-feed circularly polarized (CP) microstrip antenna is proposed in this article. The design employs the concept of E-shape patch with inclined fractal defected ground structure (IFDGS), which can improve the impedance bandwidth, gain, and axial ratio (AR) bandwidth. The excellent enhanced impedance bandwidth, axial ratio bandwidth, and gain are achieved by an inclined E-shaped fractal etched on the ground plane. The parameter studies of the E-shaped IFDGS are given to illustrate the way to obtain CP radiation. The third iterative IFDGS is fabricated on easily available FR4 substrate with a size of 0.494 λ0 × 0.494 λ0 × 0.019 λ0 (λ0 is the wavelength in free space at 3.624 GHz). The measured results verify the simulated results and show good agreement. The proposed antenna shows an impedance bandwidth of 12.7% at a centre frequency of 3.47 GHz and 3-dB AR bandwidth for this band is 2.39% at a centre frequency of 3.626 GHz. The measured peak gain for the proposed antenna is found as 8.1 dBi. The proposed antenna can be suitable for mobile WIMAX operation (IEEE 802.16e-2005 standard), wireless communication in CA-band and FCC.


Author(s):  
Funda Cirik ◽  
Bahadir Süleyman Yildirim

A high-gain microstrip patch-type WiMAX antenna operating at 3.5 GHz has been designed with a parasitic radiator and a raised ground plane. Antenna design has been carried out through extensive three-dimensional electromagnetic simulations. The patch antenna itself provides a realized gain of about 3.6 dB at 3.5 GHz. When a parasitic radiator is placed on top of the patch antenna, the gain increases from about 3.6 dB to about 7.4 dB. The raised ground plane further enhances the gain by about 1.5 dB. Hence the overall gain improvement is about 5.3 dB without the need of a radio-frequency amplifier.


2017 ◽  
Vol 56 ◽  
pp. 133-144 ◽  
Author(s):  
Tursunjan Yasin ◽  
Reyhan Baktur ◽  
Timothy Turpin ◽  
Jesus Arellano

Author(s):  
Raghuraj Sharan Saxena ◽  
Rishik Shrivastava ◽  
Ritu Muchhal ◽  
Rahul Tiwari

As the wireless technology is advancing rapidly, there is also an increasing demand for high data rates and large bandwidth. So, the new generation technology (5G) is proposed. For this purpose, there is a need of advanced antenna design, and here the authors are using a microstrip patch antenna, which is highly preferred due to low profile, simple manufacturing, and ease of feeding. This research presents the design of 28.132 GHz microstrip patch antenna. We have used FR-4 substrate here is which has a dielectric constant Er= 4.3 and a thickness of 0.5 mm. The dimensions of patch are 4.8×6.8×0.5mm including the ground plane. It has a bandwidth of 1.613 GHz, return loss of -19.175 dB, VSWR 1.24 dB, VSWR as 1.24 dB, gain as 3.82 dB and total efficiency of -3.116 dB.. The designing and simulation of this antenna is performed by CST studio suite software and various specifications such as S-parameter, VSWR, and radiation pattern is discussed. Furthermore, comparative analysis is done, which is indicating the variation of antenna parameters on varying the design dimensions.


Author(s):  
Sachin Rai ◽  
D. K. Srivastav

The circular microstrip antenna element is formed by radiating disk closely spaced above a ground plane. It is modeled as a cylindrical cavity with magnetic walls which can be resonant in the transverse magnetic modes. This circular shape microstrip antenna is analysed using cavity model and fields within the cylindrical cavity, radiation pattern and resonant frequency have been calculated. In this paper the circular microstrip antenna is designed at resonant frequency r f = 2.5 GHz. A suitable substrate of relative permittivity r 􀁈 = 4.2 and of thickness h = 1.6 mm is used to design the antenna. The simulation of this microstrip antenna is done on IE3D software and matlab. At last the simulation result and practical result of return loss are compared.


Author(s):  
Mohssine El Ouahabi ◽  
Aziz Dkiouak ◽  
Alia Zakriti ◽  
Mohamed Essaaidi ◽  
Hanae Elftouh

<span lang="EN-US">A compact design of ultra-wideband (UWB) antenna with dual band-notched characteristics based on split-ring resonators (SRR) are investigated in this paper. The wider impedance bandwidth (from 2.73 to 11.34 GHz) is obtained by using two symmetrical slits in the radiating patch and another slit in the partial ground plane. The dual band-notch rejection at WLAN and X-band downlink satellite communication system are obtained by inserting a modified U-strip on the radiating patch at 5.5 GHz and embedding a pair of rectangular SRRs on both sides of the microstrip feed line at 7.5 GHz, respectively. The proposed antenna is simulated and tested using CST MWS high frequency simulator and exhibits the advantages of compact size, simple design and each notched frequency band can be controlled independently by using the SRR geometrical parameters. Therefore, the parametric study is carried out to understand the mutual coupling between the dual band-notched elements. To validate simulation results of our design, a prototype is fabricated and good agreement is achieved between measurement and simulation. Furthermore, a radiation patterns, satisfactory gain, current distribution and VSWR result at the notched frequencies make the proposed antenna a suitable candidate for practical UWB applications.</span>


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