Some Novel Antennas Designed at AML, SDSU

Professor Satish K. Sharma Director, Antenna and Microwave Lab (AML) Department of Electrical and Computer Engineering Office Phone: 619-594-0241 Email: [email protected] http://electrical.sdsu.edu/faculty/satish/index.html Some Funded Project Antennas

DF Antenna (100MHz to 1.3GHz) UHF Band RFID Reader RFID Tag Antenna for Metallic Antenna Objects

Quasi-Log-Periodic Reconfigurable Antenna

Wideband Low Cross-Pol DRA

Wideband Reconfigurable Antenna (3:1 Bandwidth)

Ink-jet Printed Flexible Antenna Compact Reconfigurable Dipole Antenna Some Funded Project Antennas

Compact Folded Ring Resonator Antenna 4 Element MIMO Antenna

4-element DRA Antenna Triple mode patch antenna Fractal Antenna

Eleven band antenna USB Dongle MIMO Antenna Spiral Antenna Frequency Agile Antenna with MIMO MIMO Antenna with Isolation Technique 4 Elements MIMO Antenna for Tablet Size Ground

Beam Peak and Null Steering Antenna for GPS Receivers

MIMO Antenna Reconfigurable MIMO Antenna Some Funded Project Antennas Broadband CP Antenna 3D Printed Horn Antenna Massive MIMO 5G Comm Antenna

Broadband CP Antenna on a Curved Surface Multiple Radiating Modes Based Beam Steering Antenna

Multiple Mode Active Feed Boards Dipole Sub-Arrays Functional Block

(amp/phase control) Diagram

VGA PS LNA

VGA PS LNA

VGA PS LNA VGA PS LNA

VGA PS LNA VGA PS LNA

VGA VGAPS PS LNA LNA 4:1 VGA VGAPS PS LNA LNA

4:1 VGA VGAPS PS LNA LNA

4:1 4:1 VGA VGAPS PS LNA LNA

4:1 RFout VGA PS LNA RFin VGA PS LNA

Serial bus

MCU

Power Supply USB (9V, 0.5 A)

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

Address & Main Conn. Mode Adjust Control Logic • Fully assembled hybrid multiple mode phased array.

Power Supplies Multiple Modes Based 2D Beam Steering Antenna

• 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

8 Measured 3D Radiation Patterns @ 4.6 GHz

θ=0°, φ =0° Θ=13°, φ =0°

θ=28°, φ =0° θ=50°, φ =0°

9 N. Labadie, S. K. Sharma, and G. Rebeiz, “Investigations on the use of Multiple Unique Radiating Modes for 2D Beam Steering”, 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 layer superstrate is proposed. . Microstrip patch antenna with two T-shaped slots was used as feed system of RCA. . T-shaped slots was used to modify the high order mode of original microstrip patch antenna to get directional pattern.

Design Parameters: Substrate & superstrate (Arlon AD250A, W = 15mm, L = 7.3mm, W1 = 0.4mm, W2 = 0.3mm, thicknesses = 1.58mm, εr = 2.50 and L1 = 5.5mm, L2 = 2.1mm, d = 1.95mm, X = 110mm, tan δ = 0.0015) 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 A Dual Band High Gain Resonant Cavity Antenna with A Single Layer Superstrate 0

-5

-10

Low band High Band -15

-20 Measurement Simulation -25 Magnitude(dB) -30

-35

-40

-45 6 7 8 9 10 11 12 13 14 Frequency(GHz) . 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. 30 20

20 10

10 0

0 -10

φ φ Mea. Gainφ φ =0 Gain(dB) -10 Mea. Gain =90 Gain(dB) -20 Mea. Gainφ φ =90 Mea. Gainφ φ =0 Mea. Gainθ φ =0 Mea. Gainθ φ =90 -20 -30 Mea. Gainθ φ =90 Mea. Gainθ φ =0 Sim. Gainφ φ =0 Sim. Gainφ φ =0 Sim. Gainφ φ =90 Sim. Gainφ φ =90 -40 -30 Sim. Gainθ φ =0 Sim. Gainθ φ =0 Sim. Gainθ φ =90 Sim. Gainθ φ =90 -50 -40 -80 -60 -40 -20 0 20 40 60 80 -80 -60 -40 -20 0 20 40 60 80 Angle(Degree) Angle(Degree) 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 Reflectors Satish K. Sharma, Sudhakar Rao, and Lotfollah Shafai, Editors Copyright: 2013 Pages: Approx 350 ISBN: 978-1-60807-515-7

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

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