Planar Antenna With Face-Shaped Radiator and Defected Ground
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Solution Overview
Problem
Existing antenna designs for 5G and multi-band communication systems are hindered by large size, complex structures, and poor efficiency, failing to cover the entire frequency range required for 5G sub-6 GHz, WiFi, WiMAX, WLAN, and 4G LTE bands, making them unsuitable for portable devices.
Innovation Solution
A planar antenna with a human face-shaped radiator pattern and a defected ground plane, printed on a substrate, which includes circular and rectangular defect areas, enabling operation across 3.25-8.66 GHz with a compact design suitable for portable devices, reducing reflection coefficient and harmonics while increasing gain and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional antenna designs are used for 5G and multi-band communication, then frequency coverage can be achieved, but the antenna size becomes large and structure becomes complex
Solution Approach 1:
The ground plane is segmented by introducing defected ground structures (DGS) with circular and rectangular cutouts. These segmented regions create multiple resonant modes that enable wide frequency coverage across 5G, WiFi, WiMAX, and LTE bands while keeping the overall antenna footprint compact at 50mm x 30mm
Solution Approach 2:
The antenna transitions from conventional three-dimensional structures to a planar two-dimensional microstrip design. The human face-shaped radiator pattern is printed on a flat substrate with a defected ground plane, eliminating the need for bulky 3D components while achieving multi-band operation through careful design of the planar geometry
2Adaptability or versatility
If conventional antenna designs are used for 5G and multi-band communication, then frequency coverage can be achieved, but the structure becomes complex
Solution Approach 1:
Multiple functional requirements for 5G, WiFi, WiMAX, and LTE bands are merged into a single integrated planar antenna structure. The human face-shaped radiator combined with defected ground plane simultaneously supports all these frequency bands, eliminating the need for multiple separate antenna elements or complex switching networks
3Adaptability or versatility
If conventional antenna designs are used, then frequency coverage can be achieved, but efficiency becomes poor
Solution Approach 1:
The defected ground plane introduces localized resonant regions with specific electrical characteristics tailored for different frequency bands. The circular and rectangular cutouts create localized impedance transformations and resonant modes that enhance radiation efficiency at specific frequencies while maintaining overall wideband coverage
Data Source
AI summary
A planar antenna includes a radiator and a ground plane, where the radiator is formed on the ground plane. The radiator includes a printed microstrip line. The radiator includes a human face-shaped radiator pattern printed on a side of the substrate. The human face-shaped radiator pattern has an elliptical head portion, two eye portions with printed eyeball portions, two ear portions, and a mouth portion. The printed microstrip line connects to the human face-shaped radiator pattern. The ground plane includes first, second, and third circular defect areas printed on back side of the substrate. The first and second circular defect areas have the same diameter, while the third circular defect area has a diameter smaller than the first and second circular defect areas. The third circular defect area is closer to an end surface of the ground plane than the first and second circular defect areas.