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  • 1. 1 DESIGN OF CORPORATE FEED RECTANGULARMICROSTRIP PATCH ANTENNA AUTHORS P.SUBBULAKSHMI R.RAJKUMAR
  • 2. OBJECTIVES2  To design microstrip patch antenna array configuration with high gain, large bandwidth and smaller size for Wi-MAX applications.
  • 3. INTRODUCTION3  Antenna is a electrical device which converts electrical power into radio waves .  This paper proposes the design of 4-element microstrip patch antenna.  It uses corporate feed technique for excitation.  Taconic is the dielectric substrate (εr=2.2)  The design is simulated using FEKO software.  Frequency range – 1 to 6 GHz.  Attractive for airborne and spacecraft applications.  Size reduction using high dielectric materials.  Narrow bandwidth should be enhanced.  Different feeding techniques
  • 4. MICROSTRIP PATCH4 ANTENNA  Consists of thin metallic strip called patch.  Thickness of patch ( t << λ0 )  Low profile  Simple and inexpensive  Patch radiates first because of fringing fields.  Mechanically robust to mount
  • 5. MICROSTRIP PATCH ANTENNA5
  • 6. FEEDING TECHNIQUES6 FEEDING METHODS CONTACTING NON CONTACTING PIN FEED EDGE FEED APERTURE PROXIMITY COUPLING COUPLING
  • 7. FEEDING TECHNIQUES7
  • 8. Conti…8 Parameters to be discussed  Gain  Return Loss  Impedance  Radiation Pattern Softwares Required  FEKO  SONNET
  • 9. Existing Technique9 
  • 10. MICROSTRIP CORPORATE10 FEED  Provide power split of 2n (n=2,4,8,16…).  It also uses quarter wavelength transformer method.  Phase can be controlled using phase shifter.  Amplitude can be adjusted using either attenuator or amplifier.
  • 11. Microstrip Patch Design11  Design Parameters:  Frequency (f)  Lambda (c/f)  Patch depth (d)  Patch width (w)  Substrate (ɛr  Substrate Height (h)
  • 12. Conti…13  Easy to fabricate.  Simple to match the impedance by controlling the inset position.  Conducting strip is directly connected to the edge of the patch.  If thickness increases, surface waves and spurious feed radiation increases.
  • 13. Co-axial / probe14  Inner conductor  extends through dielectric.  Outer conductor connected to ground plane.  Feed can be placed anywhere in the patch.  Low spurious radiation.  Broad bandwidth applications, even for a thick dielectric substrate.  Used in Wi -MAX applications.
  • 14. 15
  • 15. MICROSTRIP CORPORATE16 FEED  Provide power split of 2n(n=2,4,8,16….).  It also uses quarter wavelength transformer method.  Phase can be controlled using phase shifter.  Amplitude can be adjusted using either attenuator or amplifier.
  • 16. DESIGN CONSIDERATION17  Frequency of operation(f0): 9-11 GHz  Dielectric constant ( εr): 2.2  Dielectric substrate: TACONIC  Height of dielectric substrate(h): 2.87mm
  • 17.  By using FEKO SUITE, we have designed the Microstrip Patch Antenna.SOFTWARE USED18
  • 18. Microstrip patch MICROSTRIP PATCH PARAMETERS parameters from19 FEKO software PATCH OBTAINED PARAMETERS VALUES F Frequency(Hz) 8.475 Hz GAIN Gain(dB) 6.8 dB RETURN LOSS Return loss(dB) -6.8 dB RESULT OF SIMULATION
  • 19. 20  Used in air borne and spacecraft applications.  Highly suitable for x-band applications.  In satellite and military systems. APPLICATIONS
  • 20. 21  Simple, Small size and high efficiency antenna can be designed.  Return loss, gain and efficiency are acceptable  Bandwidth enhancement of 20dB is possible  Our future work will be carried out using different feeding techniques with different CONCLUSION software………
  • 21. 22
  • 22. 23

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