Design and Development of Wideband Patch Arrays using Disparate Arms in K-Band for Satellite Communication

Design and Development of Wideband Patch Arrays using Disparate Arms in K-Band for Satellite Communication

1. Deepa

   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.)

   1. INTRODUCTION

      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[1], The patch array covers offer as a lower profile and light weight matching structure [2]. Asymmetric coplanar waveguide(ACPW) series feed network is used to design a 2×2 rotated patch antenna array [3]. The implementation of 2×2 patch array Using polystrata process [4]. The large array are the main issue limiting its efficiency and application e.g., T/R modules and phase shifter [5]. 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 [6]. The 2×2 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 [7]. They provide a advantage of mutual coupling between array element, Then cost of antenna is decreased [5]. It improve the isolation by 16 dB [6]. They design the wide band micro strip patch antenna for ultra wide band applications. It achieved by using folded-patch feeds technique [8]. The 2×2 patch array is implemented by using sequencial-phase feeding network. Both axial ratio and impedance bandwidth is enhanced and wider than previous

      S. Nithya

      Assistant Professor, Department of ECE, K.Ramakrishnan College of Technology, Samayapuram, Trichy.

      published sequencial -fed single layer patch arrays [9]. The patch antenna are used to generate millimeter-wave hermite- gaussian beam at E-band [10].

   2. EASE OF USE

1. ANTENNA DESIGN AND PERFORMANCE

   The geometry of the proposed 1×2 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 80×50mm^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.

   1. Side View

      Fig 1: Side view design

      Table 1: Parameters Of Unequal ARMs

      Table 1: Parameters Of Unequal ARMs

      26.25mm

      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

      80mm×50mm

      W2 5mm L2 6.5mm S

      M 6.5mm L3 4.5mm h 1.6mm

   2. TOP VIEW

   Fig 2: Top View Design

   C.CURRENT DISTRIBUTION

   Fig 3: Current Distribution Design

2. SIMULATION AND EXPERIMENTAL

   RESULTS

   A. RETURN LOSS

   Fig 4: Return Loss Graph

3. SIMULATION AND EXPERIMENTAL

   GRAPH

   The simulation results are made sing the Ansoft HFSS with the finite element method. Fig.1, displays the proposed 1×2 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 1×2 and 1×4 patch arrays within the operational bandwidth is 7 and 8 dB, respectively.

   1. GAIN

      Fig 5: 3D Radiation Pattern of the Patch Antenna

      A. VSWR

      Fig 6: VSWR graph

   2. CONCLUSION

In this paper, an attempt has been made to enhance significantly. The bandwidth of the suggested 1×2 and 1×4 patch array by introducing the pattern with disparate arms and CPW-to-slot line feeding technique. The 1×2 and 1×4 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.

REFERENCES

1. Malcom Ng Mou Kehn and Lotfollah shafai, Improved matching of waveguide focal plane arrays using patch overs as compared to conventional dielectric sheets, IEEE Transaction On Antenna Propogation,vol.37,no.10,October 2009.

2. Mohamad H. Awida and Aly E. Fathy, Substrate-integrated waveguide ku-band cavity-backed 2×2 microstrip atch array antenna, IEEE Antennas And Wireless Propogation Letters,vol.8,2009.

3. Zhonghao Wang, Shaojun Fang,Shiqiang Fu and Shouli Jia, An inmarsat BGAN terminal patch aantenna array with unequal input impedance element and conductor-backked ACPW series-feed network, IEEE Transaction On Antenna And Propogation,vol.60,no.3,march 2012.

4. John Marcus Oliver, Jean-Marc Rollin, Kern Vanhile, Sanjay Raman, A W-band micromachined 3-d cavity-backed patch antenna array with integrated diode detector, IEEE Transaction On Microwave Theory And Techniques,vol.60,no.2,February 2012.

5. Shi-Wei Qu,De-Jun He,Ming-Yao Xia,Zai-Ping Nie and Chi Hou Chi Hou Chan Fellow, High-efficiency periodic sparse patch array based on mutual coupling, IEEE Antenna And Wireless Propagation Letter,vol.10,2011

6. M.Gulam Nabi Alsath, Malathi Kanagasabai and Bhuvaneshwari Balasubramaniyan, Implementation of slotted meander-line resonators for isolation enhancement in microstrip patch antenna arrays, IEEE Antenna And Wireless Propagation Letters,vol.12,2013

7. H.Wang, X.B.Huang, D.G.Fang, A single layer wideband U-slot Microstrip patch antenna array, IEEE Antenna and wireless propagation letters,vol.7,2008

8. Hossein Malekpoor and Shahrokh Jam, Member, Enhanced bandwidth of shorted patch antennas using folded-patch techniques,IEEE Antennas And Wireless Propagation Letters,vol 12,2013

9. Changjiang Deng, Yue Li, Zhijun Zhang, and Zhenghe Feng, A wideband sequential-phase ed circularly polarized patch array, IEEE Transaction On Antenna And Propagation,vol 62,no.7,July 2014

10. Haohan Yao, Harini Kumar, Thethnini Ei, Nima Ashrafi, Solyman Ashrafi, Duncan L, MacFarlane, and Rashaunda Henderson, Patch antenna array for the generation of milimeter-wave hermite-gaussian beams, IEEE Antennas And wireless Propagation Letters, vol. 15,2016