LEXIBLE C-BAND WIFI ANTENNA

Introduction

Flexible antennas needed for modern wireless devices

Liquid crystal polymer (LCP) and Kapton common flexible substrates

Proposed interconnected C-shaped antenna on Kapton polyimide

Antenna Design

C-shaped and inverted C-shaped radiators

Interconnected to minimize coupling

CPW feed for easy integration

Results

Dual-band at 5.5GHz and 8.7GHz

13% (5.1-5.95GHz) and 20% (7.85-9.65GHz) impedance bandwidth

Omnidirectional radiation patterns

Stable gain around 3dBi, efficiency >90%

Bending Analysis

Negligible performance change when bent along X and Y axes

Validates flexibility for integration in space-constrained devices

Conclusion

Compact flexible antenna covering WiFi and fixed wireless bands

Kapton substrate enables good conformation with minimal impact

Suitable for wearable and flexible wireless electronic devices

Key Highlights

Interconnected C-shaped radiators provide dual-band operation

Kapton polyimide flexible substrate suited for high frequencies

Maintains performance when bent due to flexibility

Applicable for wearable devices and compact wireless gadgets

5G MMWAVE MIMO ANTENNA ARRAY

Introduction

5G uses mmWave frequencies of 24-86 GHz for high data rates

Microstrip antennas suitable due to low-profile, lightweight, easy

integration

Antenna arrays can improve gain and bandwidth compared to single

elements

Single Antenna Design

Rectangular patch on Rogers RT/Duroid 5880 substrate

Inset feed for impedance matching

Resonates at 28 GHz with 3 GHz bandwidth

8-Element MIMO Array

1x8 array with identical patch elements

Spacing of 0.5λ between elements

Achieves 3.94 GHz bandwidth from 26.6-30.54 GHz

Results

8-element array provides around 5 dB gain improvement

Radiation patterns show high directivity

14.81 dBi peak gain in array compared to 9.81 dBi in single element

Conclusion

Compact 28 GHz MIMO array demonstrated

Array combines elements to enhance gain and bandwidth

High gain and directivity suitable for 5G mmWave systems

Key Highlights

Microstrip patch antennas preferable for 5G mmWave due to ease of

integration

Antenna arrays essential to achieve required gain and bandwidth

Proposed 8-element design shows significant improvement over

single patch

High gain, directivity and bandwidth validate applicability for 5G

networks

CPW-FED ANTENNA FOR MEDICAL APPLICATIONS

Introduction

Medical antennas needed for patient healthcare monitoring

CPW-fed antennas suitable for wearable and on-body

communication

Proposed inverted F-shaped CPW-fed antenna for ISM and 5G bands

Antenna Design

Inverted F-shaped radiator on Teflon substrate

CPW ground plane and feedline on same side

Bio-layers like skin, fat, muscle modeled

Results

Resonates at 2.45GHz and 3.4GHz

Good impedance matching with skin layers

E-field directional, H-field omni-directional radiation patterns

Gain around 2.5dBi at 2.45GHz and 4dBi at 3.4GHz

Conclusion

CPW-fed inverted F antenna provides dual band operation

Suitable for on-body communication in ISM and 5G bands

Can be integrated in wearable systems for patient monitoring

Key Highlights

CPW feed allows easy integration in compact wearable devices

Bio-layers introduced for realistic on-body modeling

Dual-band operation covers important medical frequency bands

Promising for wearable sensors and on-body health monitoring

Students also viewed