Abstract
Two-element tapered slot antenna (TSA) array for terahertz (THz) resonant tunneling diode (RTD) oscillators is proposed in this paper. The proposed TSA array has the advantages of both the high directivity and high gain at the horizontal direction and hence can facilitate the horizontal communication between the RTD oscillators and other integrated circuit chips. A MIM (metal-insulator-metal) stub with a T-shaped slot is used to reduce the mutual coupling between the TSA elements. The validity and feasibility of the proposed TSA array have been simulated and analyzed by the ANSYS/ANSOFT’s High Frequency Structure Simulator (HFSS). Detailed modeling approaches and theoretical analysis of the proposed TSA array have been fully addressed. The simulation results show that the mutual coupling between the TSA elements is reduced below −40 dB. Furthermore, at 500 GHz, the directivity, the gain, and the half power beam width (HPBW) at theE-plane of the proposed TSA array are 12.18 dB, 13.09 dB, and 61°, respectively. The proposed analytical method and achieved performance are very promising for the antenna array integrated with the RTD oscillators at the THz frequency and could pave the way to the design of the THz antenna array for the RTD oscillators.
Highlights
The terahertz (THz) frequency, ranging from 100 GHz to 10 THz, has recently attracted a large number of interests in lots of applications, such as radio astronomy, biological monitoring, nondestructive evaluation, and information and communications technology (ICT) [1,2,3,4]
The MIM stub with a T-shaped slot is used to reduce the mutual coupling between the tapered slot antenna (TSA) elements
The proposed analytical method and achieved performance are very promising for the antenna array integrated with the resonant tunneling diode (RTD) oscillators at the THz frequency and could pave the way to the design of the THz antenna array for the RTD oscillators
Summary
The terahertz (THz) frequency, ranging from 100 GHz to 10 THz, has recently attracted a large number of interests in lots of applications, such as radio astronomy, biological monitoring, nondestructive evaluation, and information and communications technology (ICT) [1,2,3,4]. The design of the antenna array which can achieve the output power combination of the RTD oscillators. The offset-fed slot antenna array for the RTD oscillators is reported in [20], which achieves the individual output powers of 1.9 uW at 329 GHz and 2.6 uW at 332 GHz, respectively. The detailed modeling approaches and theoretical analysis of a high directivity and high gain TSA array for THz RTD oscillators are proposed. To our knowledge, this is the first time to apply the TSA array integrated with the RTD oscillators. The proposed analytical method and achieved performance are very promising for the antenna array integrated with the RTD oscillators at the THz frequency and could pave the way to the design of the THz antenna array for the RTD oscillators
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