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DESIGN OF CORPORATE
FEED RECTANGULAR
MICROSTRIP PATCH ANTENNA
AUTHORS
P.SUBBULAKSHMI
R.RAJKUMAR

2. OBJECTIVES
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 To design microstrip patch antenna array
configuration with high gain, large
bandwidth and smaller size for Wi-MAX
applications.

3. INTRODUCTION
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 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 PATCH
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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 ANTENNA
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6. FEEDING TECHNIQUES
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FEEDING METHODS
CONTACTING NON CONTACTING
PIN FEED EDGE FEED APERTURE PROXIMITY
COUPLING COUPLING

7. FEEDING TECHNIQUES
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8. Conti…
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Parameters to be discussed
 Gain
 Return Loss
 Impedance
 Radiation Pattern
Softwares Required
 FEKO
 SONNET

9. Existing Technique
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

10. MICROSTRIP CORPORATE
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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 Design
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 Design Parameters:
 Frequency (f)
 Lambda (c/f)
 Patch depth (d)
 Patch width (w)
 Substrate (ɛr
 Substrate Height (h)

12. Conti…
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 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 / probe
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 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.

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15. MICROSTRIP CORPORATE
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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 CONSIDERATION
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 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 USED
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18. Microstrip patch MICROSTRIP PATCH PARAMETERS
parameters from
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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

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 Used in air borne and spacecraft
applications.
 Highly suitable for x-band
applications.
 In satellite and military systems.
APPLICATIONS

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 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………

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