Design of a Multiple Band Vehicle-Mounted Antenna

Yong Cheng,Can Wang,Jing Lu

doi:10.1155/2019/6098014

Yong Cheng, Can Wang + Show 1 more

Open Access

https://doi.org/10.1155/2019/6098014

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Abstract

This paper designs a vertically polarized, horizontal, omnidirectional vehicle antenna for the mobile communication band, covering the available frequency bands of the wireless sensor network and 5G. The antenna is composed of semi-T monopole and semicone monopole, which are placed vertically on the metal plate, especially suitable for being mounted on top of a car. T-branch mainly works at low frequency, and cone branch mainly works at high frequency. The cone branch adopts tapered structure in order to improve the impedance matching of antenna and increase the bandwidth of antenna. The antenna can be miniaturized by cutting the antenna in half. The operating frequencies of the antenna are 770 MHz–1000 MHz and 1.7 GHz–3.78 GHz which can cover multiple wireless system bands, including GSM, LTE, and 5G.

Highlights

International Journal of Antennas and Propagation impedance matching, especially at higher frequencies
E wireless communication of the sensor network can be used in the 868 MHz, 908 MHz, and 2.4 GHz bands. is paper presents the design of a vertically polarized, horizontal, omnidirectional vehicle antenna for the mobile communication band
Structural Design of the Two-Branch Vehicle Antenna e antenna of the mobile communication band designed in this paper consists of a dielectric plate, a semi-T monopole, a semiconical monopole, and a metal floor. e structure is shown in Figure 1. e gray part indicates the dielectric substrate, the yellow part indicates the metal radiating antenna, the red part indicates the feeding part, and the antenna is vertically mounted on the metal floor of 300 mm ∗ 300 mm. e antenna was printed on a dielectric substrate made of FR4 with the thickness of 1.6 mm. e coaxial line was fed, and the impedance matching was set to 50 Ohm

Summary

Design Process of the Two-Branch Vehicle Antenna

E goal of the antenna in this paper is to support the mobile communication frequency band, namely low frequency as 824 MHz–960 MHz and high frequency as 1710 MHz– 2690 MHz and 3.4 GHz–3.6 GHz. the T-shaped monopole works at low frequency. Erefore, in order to reduce the size of the antenna, the antenna is cut in half and the rest is unchanged, and the model antenna shown in Figure 2(d) is obtained.

Simulation Analysis of the Two-Branch Vehicle Antenna

Processing and Measurement of the TwoBranch Vehicle Antenna

Findings

Conclusion