Leaky Wave-Guide Based Dielectric Resonator Antenna for Millimeter-Wave Applications
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Transactions on Electrical and Electronic Materials https://doi.org/10.1007/s42341-020-00240-w
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Leaky Wave‑Guide Based Dielectric Resonator Antenna for Millimeter‑Wave Applications Sovan Mohanty1 · Baibaswata Mohapatra2 Received: 19 November 2019 / Revised: 28 August 2020 / Accepted: 7 September 2020 © The Korean Institute of Electrical and Electronic Material Engineers 2020
Abstract In this paper, a leaky wave antenna based on the parallel non-radiative dielectric guide (NRD) has been proposed. This novel design uses two parallel dielectric strip waveguides having a dielectric constant of 2.2 are placed over a substrate of the dielectric constant of 2.55 and both are separated by a ground plane. The upper structure is bounded by deflating conducting strip having distance less than λ0/2. The leakage from this antenna is in the form of surface wave concentrated more in the broadside direction rather than usual endfire or off broadside direction. It has been observed the proposed radiating structure has radiation efficiency of 82%, the peak gain of 5.94 dB with narrow impedance bandwidth, and the resonating frequency at 13.59 GHz, 13.43 GHz, and 13.93 GHz. A comparative analysis is made by increasing the height of the dielectric strip to increase the number of modes. This leaky-wave structure based on a non-radiative dielectric (NRD) guide can be a suitable candidate for the device to device (D2D) communication in the millimeter-wave band. Keywords Dielectric resonator antenna · Non-radiating dielectric guide · Leaky wave antenna
1 Introduction Microwave and millimeter-wave technologies have undergone a tremendous shift in the last decade in the quest for high speed, ultra-high gain, relatively wide bandwidth, polarization purity along with miniaturized structure [1]. Earlier microwave technology was confined to defense and military-based applications. But now a day, it is becoming the front runner as a fundamental technology in Wireless communications such as 5G, high-speed computation, and other industrial, medical, and commercial applications. Design challenges are numerous because of nonlinearity, non-homogeneous behavior, distributed parameters based analysis where effect like dispersion, multiple reflections, transit time effect act as a barrier to high-speed * Baibaswata Mohapatra [email protected] Sovan Mohanty [email protected] 1
Department of Electronics and Communication Engineering, SRMS College of Engineering and Technology, Bareilly, U.P., India
School of Electrical, Electronics and Communication Engineering, Galgotias University, Greater Noida, U.P., India
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communication [2]. The radiator for the modern communication system should have low radiation Q-factor, wide bandwidth, high gain, low loss, and small size with high radiation efficiency [3, 4]. An antenna is said to be small, whose maximum dimension is less than the radian length 1 where the radian length is 2𝜋 of the free-space wavelength (λ0) [5]. High bandwidth can be realized by enhancing the coupling with
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