- Open Access
- Total Downloads : 21
- Authors : J. Deepa, S. Nithya
- Paper ID : IJERTCONV5IS13127
- Volume & Issue : ICONNECT – 2017 (Volume 5 – Issue 13)
- Published (First Online): 24-04-2018
- ISSN (Online) : 2278-0181
- Publisher Name : IJERT
- License: This work is licensed under a Creative Commons Attribution 4.0 International License
Design and Development of Wideband Patch Arrays using Disparate Arms in K-Band for Satellite Communication
Assistant Professor, Departmet of ECE, K.Ramakrishnan College of Technology, Samayapuram, Trichy.
Abstract This paper presents a wideband patch antenna array in k-band for wideband operation. The proposed patch arrays are designed by using disparate resonance arms fed by coplanar waveguide. This proposed antenna covers the frequency ranges (S11<=-10 dB) from 15 to 35 GHz. The main purpose of designing the proposed antenna to enhance the impedance bandwidth. By varying the length of the disparate arms, To broadening the impedance bandwidth. Coplanar waveguide (CPW) feed is introduced for improving its impedance bandwidth and radiation performance. The proposed antenna arrays have some features such as resonance tuning ability, low- fabrication cost and enhanced bandwidth. This antenna is simulated using HFSS and fabricated, tested for S-parameters and the performances is used for wideband applications. The proposed antenna mainly used for satellite communication.
Keywords Antenna Arrays, Coplanar Waveguide(CPW), Micro strip Antenna.)
AMAJOR hurdle in the micro strip patch antenna array design is its limited band width. The substrate-integrated waveguide (SIW) technology is used to design a cavity- backed micro strip patch antenna array at low cost multilayer printed circuit board process and Co-axial feed line is used in this antenna . However, at low frequencies where the radiation performance tends to poor due to strong mutual coupling between separated elements, The patch array covers offer as a lower profile and light weight matching structure . Asymmetric coplanar waveguide(ACPW) series feed network is used to design a 2Ã—2 rotated patch antenna array . The implementation of 2Ã—2 patch array Using polystrata process . The large array are the main issue limiting its efficiency and application e.g., T/R modules and phase shifter . They enhance the isolation in micro strip patch antenna array. The resonant frequency of the two patch antennas Coupled along H-plane at a frequency
4.8 GHz . The 2Ã—2 micro strip line fed U-Rectangular
antenna implemented by place the feeding network and patch array in same layer. It give frequency range from 5.65 GHz to
6.78 GHz . They provide a advantage of mutual coupling between array element, Then cost of antenna is decreased . It improve the isolation by 16 dB . They design the wide band micro strip patch antenna for ultra wide band applications. It achieved by using folded-patch feeds technique . The 2Ã—2 patch array is implemented by using sequencial-phase feeding network. Both axial ratio and impedance bandwidth is enhanced and wider than previous
Assistant Professor, Department of ECE, K.Ramakrishnan College of Technology, Samayapuram, Trichy.
published sequencial -fed single layer patch arrays . The patch antenna are used to generate millimeter-wave hermite- gaussian beam at E-band .
EASE OF USE
ANTENNA DESIGN AND PERFORMANCE
The geometry of the proposed 1Ã—2 patch array is used. This antenna is composed of two radiating patches with three disparate resonance arms resonance which made up of FR4 substrate with the dimensions of 80Ã—50mm^2. Patches are fed by the CPW, which excite by slot line transitions with the T- shape slots on the opposite side of the substrate. The thickness and relative permittivity of FR4 substrate are chosen to be h=1.6 mm and 2.2 respectively connect to the ground plane with slot line sections. Both total width and length patches are 24mm, which are printed on the ground plane.
Fig 1: Side view design
Table 1: Parameters Of Unequal ARMs
Table 1: Parameters Of Unequal ARMs
W 24mm L 24mm Lcpw
Wl 6mm LI 24mm Wcpw 3mm
Wm 4mm Lm 18mm T1 20mm
Ws 4mm Ls 14mm T2 11mm
W1 5mm L1 9.5mm T3 3.2mm
W2 5mm L2 6.5mm S
M 6.5mm L3 4.5mm h 1.6mm
Fig 2: Top View Design
Fig 3: Current Distribution Design
SIMULATION AND EXPERIMENTAL
A. RETURN LOSS
Fig 4: Return Loss Graph
SIMULATION AND EXPERIMENTAL
The simulation results are made sing the Ansoft HFSS with the finite element method. Fig.1, displays the proposed 1Ã—2 patch array is designed. It mainly fabricated to cover the measured frequency range from 15 to 35 GHz for S11<=-10 db. It includes the wide bandwidth in k-band. Fig.1, domonstrates that the proposed patch array operates at 15 to
35 GHz for measured -10-Db impedance bandwidth. The proposed design indicates better performance compared to other wide band patch arrays. The measured and simulated radiation patterns in the xz-plane(H-plane) and yz-plane(E- plane) at 9.5 and 9.8GHz for the proposed array shown in Fig.1, The gain of the 1Ã—2 and 1Ã—4 patch arrays within the operational bandwidth is 7 and 8 dB, respectively.
Fig 5: 3D Radiation Pattern of the Patch Antenna
Fig 6: VSWR graph
In this paper, an attempt has been made to enhance significantly. The bandwidth of the suggested 1Ã—2 and 1Ã—4 patch array by introducing the pattern with disparate arms and CPW-to-slot line feeding technique. The 1Ã—2 and 1Ã—4 patch arrays include 15 to 35 GHz for wideband operation in k-band. The wide band operation shows that it can predict and explain the broad band properties of the proposed antenna.
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