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Compact N-Band Tree-Shaped Multiplexer-Based Antenna Structures for 5G/IoT Mobile Devices
Amélia Ramos1,2, Tiago Varum1,2, João N Matos1,2
1Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
Sensors (Basel, Switzerland)
|November 11, 2020
Summary
This study introduces a simple, low-cost method for creating compact multi-band antennas for 5G networks. These versatile antennas efficiently support multiple frequencies from a single feed point, saving space and enhancing performance.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Antenna Theory
Background:
- Future generation networks (5G) require versatile, heterogeneous, and multi-band antennas.
- Overcrowded radio frequency spectrum necessitates efficient antenna solutions.
- Existing multi-band antennas often face challenges with efficiency and scalability.
Purpose of the Study:
- To present a simple, compact, and low-cost design methodology for low-profile multi-band antennas.
- To enable a single antenna to serve multiple radio-frequency (RF) frontends, optimizing space.
- To develop scalable antenna structures suitable for 5G applications.
Main Methods:
- Design of multi-band antennas using 'n' radiating monopoles, each for a specific frequency.
- Integration of a frequency-selective feeding network for single-point excitation.
- Frequency multiplexing to isolate individual monopoles and enhance efficiency.
Main Results:
- Successful construction and characterization of dual-band and tri-band antenna prototypes.
- Achieved peak efficiencies around 80% for both prototypes.
- Demonstrated adequate bandwidths, gains, and remarkable compactness.
Conclusions:
- The proposed design method offers a viable solution for creating efficient, compact, and low-cost multi-band antennas.
- The frequency-selective feeding network effectively isolates monopoles, ensuring high efficiency.
- The scalable nature of the design makes it suitable for diverse 5G applications.
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