Some Novel Antennas Designed at AML, SDSU

Professor Satish K. SharmaDirector, Antenna and Microwave Lab (AML)

Department of Electrical and Computer Engineering Office Phone: 619-594-0241

Email: ssharma@mail.sdsu.eduhttp://electrical.sdsu.edu/faculty/satish/index.html

Some Funded Project Antennas

DF Antenna (100MHz to 1.3GHz) UHF Band RFID Reader Antenna

RFID Tag Antenna for Metallic Objects

Quasi-Log-Periodic Reconfigurable Antenna

Wideband Reconfigurable Antenna (3:1 Bandwidth)

Wideband Low Cross-Pol DRA

Compact Reconfigurable Dipole AntennaInk-jet Printed Flexible Antenna

Some Funded Project Antennas

Compact Folded Ring Resonator Antenna 4 Element MIMO Antenna

Fractal AntennaTriple mode patch antenna

4-element DRA Antenna

USB Dongle MIMO Antenna

Eleven band antenna Spiral Antenna

Frequency Agile Antenna with MIMO MIMO Antenna with Isolation Technique

MIMO AntennaReconfigurable MIMO Antenna

4 Elements MIMO Antenna for Tablet Size Ground

Beam Peak and Null Steering Antenna for GPS Receivers

Some Funded Project AntennasBroadband CP Antenna

Broadband CP Antenna on a Curved Surface

3D Printed Horn Antenna Massive MIMO 5G Comm Antenna

Multiple Radiating Modes Based Beam Steering Antenna

MCU

LNAVGA

PS

LNAVGA

PS

LNAVGA

PS

LNAVGA

PS

4:1

LNAVGA

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LNAVGA

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LNAVGA

PS

LNAVGA

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4:1

LNAVGA

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LNAVGA

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LNAVGA

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LNAVGA

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4:1

LNAVGA

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LNAVGA

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LNAVGA

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LNAVGA

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4:14:1

Serial bus

Power Supply

(9V, 0.5 A)

USB

RFout RFin

Active Feed Boards(amp/phase control)

Multiple ModeDipole Sub-ArraysFunctional Block

Diagram

N. Labadie, S. K. Sharma, and G. Rebeiz, “A Novel Approach to Beam Steering using Arrays Composed of Multiple Unique Radiating Modes”, IEEE Trans Antennas and Propagation, USA, Vol. 63, No. 7, July 2015, pp. 2932 - 2945

16-Element Active Dipole Array

• Fully assembled hybrid multiple mode phased array.

Mode AdjustAddress & Control Logic

Power Supplies

Main Conn.

Multiple Modes Based 2D Beam Steering Antenna

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• Fabricated prototype

• Additional layer needed to space SMA connectors

• Will use same C-band active feed boards developed for linear dipole array

• In practice, radiators and active/passive feed implemented on a single PCB

Measured 3D Radiation Patterns @ 4.6 GHz

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Θ=13°, φ =0°

θ=28°, φ =0° θ=50°, φ =0°

θ=0°, φ =0°

N. Labadie, S. K. Sharma, and G. Rebeiz, “Investigations on the use of Multiple Unique Radiating Modes for 2D BeamSteering”, IEEE Trans Antennas and Propagation, Vol. 64, No. 11, November 2016.

A Dual Band High Gain Resonant Cavity Antenna with A Single Layer Superstrate

A dual-band high gain Resonant Cavity Antenna (RCA) with single layersuperstrate is proposed.

Microstrip patch antenna with two T-shaped slots was used as feedsystem of RCA.

T-shaped slots was used to modify the high order mode of originalmicrostrip patch antenna to get directional pattern.

Substrate & superstrate (Arlon AD250A,thicknesses = 1.58mm, εr = 2.50 andtan δ = 0.0015)

Design Parameters:W = 15mm, L = 7.3mm, W1 = 0.4mm, W2 = 0.3mm,L1 = 5.5mm, L2 = 2.1mm, d = 1.95mm, X = 110mm,Y = 110mm.

F. Meng and S. K. Sharma, “A Dual-Band High Gain Resonant Cavity Antenna with A Single Layer Superstrate”, IEEE Trans Antennas and Propagation , May 2015

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MeasurementSimulation

Low band High Band

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Mea. Gainφ φ =0Mea. Gainφ φ =90Mea. Gainθ φ =0Mea. Gainθ φ =90Sim. Gainφ φ =0Sim. Gainφ φ =90Sim. Gainθ φ =0Sim. Gainθ φ =90

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Mea. Gainφ φ =90Mea. Gainφ φ =0Mea. Gainθ φ =90Mea. Gainθ φ =0Sim. Gainφ φ =0Sim. Gainφ φ =90Sim. Gainθ φ =0Sim. Gainθ φ =90

A Dual Band High Gain Resonant Cavity Antenna with A Single Layer Superstrate

RCA yields around 16.5dBi and 20.9 dBi gain values at 7GHz and 13GHz, respectively. The RCA operated in dual-band with single polarization with frequency ratio of 1.93.

Frequency Tunable with Polarization Reconfigurable Antenna Frequency tunable with simultaneous polarization reconfigurable beam steering array antenna is being designed and developed for experimental verification.

(a) (b) (c)

(d) (e)

(f) (g)

B. Babakhani and S. K. Sharma, “Wideband Frequency Tunable Circular Microstrip Patch Antenna with Simultaneous Polarization Reconfiguration”, IEEE Antennas and Propagation Magazine, USA, April, 2015.

Simultaneous frequency agile and polarization reconfigurable Phased Array Antenna

Behrouz Babakhani, and S. K. Sharma, “A Frequency Agile Microstrip Patch Phased Array Antenna with Polarization Reconfiguration”, IEEE Trans Antennas and Propagation, Vol. 74, No. 10, October 2016

Handbook of Reflector Antennas and Feed Systems Volume 1: Theory and Design of ReflectorsSatish K. Sharma, Sudhakar Rao, and Lotfollah Shafai, EditorsCopyright: 2013Pages: Approx 350ISBN: 978-1-60807-515-7

Handbook of Reflector Antennas and Feed Systems Volume 2: Feed SystemsLotfollah Shafai, Satish K. Sharma, and Sudhakar Rao, EditorsCopyright: 2013Pages: Approx 450ISBN: 978-1-60807-517-1

Handbook of Reflector Antennas and Feed Systems Volume 3: Applications of ReflectorsSudhakar Rao, Lotfollah Shafai and Satish K. Sharma, EditorsCopyright: 2013Pages: Approx 450ISBN: 978-1-60807-519-5