Abstract
In this paper, we present a non-standalone dual-band shared aperture antenna array that operates at both the current Dedicated Short Range Communications (DSRC) band (viz. 5.9 GHz) and the future 5G millimeter-wave (mm-wave) band (viz. 28 GHz) allocated for vehicle-to-vehicle (V2V) communications. The design consists of a 2 $\times $ 2 differentially fed patch array operating at 5.9 GHz, co-printed with a 1 $\times $ 2 series fed array operating at 28 GHz on a single layer substrate. In particular, the shared aperture array operates from 5.84-5.94 GHz (DSRC band) with a 100 MHz impedance bandwidth and from 27.75 - 28.47 GHz (5G mm-wave band) with a 720 MHz impedance bandwidth. Gain improvement of ~1.44 dB at 28 GHz is observed as a result of the higher order modes generated by the 5.9 GHz array. The shared aperture array was fabricated and measured showing a gain of ~9.97 dBi at 5.9 GHz and ~12.3 dBi at 28 GHz. The ports of the array are highly isolated with measured isolation >55 dB at the DSRC band and >33 dB at the 5G mm-wave band.
Highlights
G LOBALLY, road accidents claim 1.3 billion lives per year [1]
The design consists of a 2×2 differentially fed patch array operating at 5.9 GHz, coprinted with a 1×2 series fed array operating at 28 GHz on a single layer substrate
The shared aperture array operates from 5.84-5.94 GHz (DSRC band) with a 100 MHz impedance bandwidth and from 27.75 - 28.47 GHz (5G mm-wave band) with a 720 MHz impedance bandwidth
Summary
G LOBALLY, road accidents claim 1.3 billion lives per year [1]. in the US, road accidents result in 38 thousand deaths per year [2]. In [12], two different frequency patches operating at 12.1 GHz and 17.4 GHz are integrated together using sequential rotation feeding technique for dual-band operation These single feed dual-band antennas require additional RF components in the front-end for separate multiband operation. The implemented PCB shared aperture array operates at dual band with highly isolated ports and provides gain improvement at upper band by utilizing the higher order modes of the lower band array. A low profile non-standalone, dual-band, shared aperture antenna array with gain improvement is de-. Two patch antenna arrays operating at the fundamental mode TM10 are designed at two different frequency bands.
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