Dual‐Band Filtering Dielectric Antenna Using High‐Quality‐Factor Y₃Al₅O₁₂ Transparent Dielectric Ceramic

Abstract

The Y3Al5O12 transparent dielectric ceramic is of permittivity εr ≈10.53 and Q × f ≈ 95219 GHz (Q = quality factor = 1/tanδ and f = 7.37 GHz), which is excellent to be applied for the dielectric resonator antenna (DRA). A dual‐band filtering DRA (FDRA) is proposed to verify the special dielectric properties of Y3Al5O12 transparent dielectric ceramic. The FDRA is designed by seamlessly integrating a dual‐band DRA based on rectangular Y3Al5O12 transparent ceramic with a quadruple‐mode stub‐loaded loop resonator (SLLR). The DRA operates at the TE111y and TE113y modes excited by a common coupling slot. The SLLR serves as a feeding network, whereas the DRA works as a dual‐mode resonator as well as the radiating element. The reflection coefficient, realized gain, and the radiation pattern of the dual‐band FDRA are examined. It is observed that the proposed FDRA operates at 3.42 and 5.28 GHz with impedance bandwidths of 5.8% and 4.0%, respectively, which are used for the fifth‐generation (5G) network and applications. Good dual‐band filtering performance is achieved while realizing radiation efficiency above 84.1% and 85.4% at two bands.

Large‐Area Smooth Conductive Films Enabled by Scalable Slot‐Die Coating of Ti3C2Tx MXene Aqueous Inks

“…The scalable printing/coating of nanomaterials from solution into highly conductive films is critical for diverse applications, including conventional electronics and transparent electronics, such as electromagnetic interference shielding, [1] antennas, [2] supercapacitors, touch screens, [3] or sensors, [4] to name just a few. Flexible transparent conductive electrodes (TCEs) display enormous potential for integration in next-generation wearable electronics.…”

Fabrication of Wideband Low‐Profile Dielectric Patch Antennas from Temperature Stable 0.65 CaTiO3–0.35 LaAlO3Microwave Dielectric Ceramic

“…Moreover, the DPA can get rid of the limitation of the relationship between dielectric constant and radiation modes of antenna, with the advantages of low-profile, high radiation efficiency, high gain, and stable performance. [9,34,35] In the present work, high-quality factor CTLA with perovskite structure was synthesized by solid-state reaction method. Moreover, the phase structure, microscopic structure densification, and microwave properties of the CTLA composite ceramics are investigated.…”

A Dual-Band, Dual-Polarized Filtering Antenna Based on Cross-Shaped Dielectric Strip Resonator

“…The dual-band filtering dielectric antenna reported is only single-polarized [20][21][22][23]. In [20], the dielectric resonator and the slot lines contribute to two radiation frequency bands, and the open stubs of the feedline and the coupled slot lines accomplish three radiation nulls.…”

“…In [20], the dielectric resonator and the slot lines contribute to two radiation frequency bands, and the open stubs of the feedline and the coupled slot lines accomplish three radiation nulls. In [21], the dual-mode dielectric radiator uses the quadruple-mode, stubloaded loop resonator to feed, and realizes the dual-band filtering characteristics. In [22], the dual-mode dielectric resonator uses a microstrip line feed to realize the dual-band filtering design with higher frequency selectivity.…”