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Author

Wen-Wen Yang

Other affiliations: Ningbo University
Bio: Wen-Wen Yang is an academic researcher from Nantong University. The author has contributed to research in topics: Dielectric resonator antenna & Wideband. The author has an hindex of 7, co-authored 28 publications receiving 137 citations. Previous affiliations of Wen-Wen Yang include Ningbo University.

Papers
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Journal ArticleDOI
Hui Tang1, Jian-Xin Chen1, Wen-Wen Yang1, Li-Heng Zhou1, Li Wenhua1 
TL;DR: In this paper, a differential dual-band dual-polarized dielectric resonator antenna (DRA) with high isolation and low cross polarization using a cross-shaped DR was proposed.
Abstract: This communication presents a differential dual-band dual-polarized dielectric resonator antenna (DRA) with high isolation and low cross polarization using a cross-shaped DR. In the differential DRA, some of the higher order modes are eliminated and electromagnetic fields of each excited mode have no interaction with its corresponding orthogonal mode. Two groups of modes are utilized to realize dual-band characteristic and each group with two orthogonal modes is used to supply dual-polarized function. Differential feeding provides the DRA with suppression of unwanted modes, much higher isolation and lower cross-polarization in both frequency bands, compared with the traditional single-end feeding. The experimental prototypes of the proposed differential DRA and its single-ended counterpart are designed and implemented. The comparison between them is also made in reflection coefficient, isolation, and radiation properties. Both simulated and measured results show significantly improved performance of the proposed differential DRA.

49 citations

Journal ArticleDOI
TL;DR: In this paper, a stacked DRA with high-permittivity dielectric strips layered on low-perceptivity substrate is adopted for bandwidth and gain benefits for satellite applications.
Abstract: A circularly polarized (CP) dielectric resonator antenna (DRA) with wide bandwidth and low axial ratio (AR) values is presented in this communication. The antenna consists of a stacked DRA, and it is fed by a substrate integrated waveguide coupling slot from the bottom. The stacked DRA structure, with high-permittivity dielectric strips layered on low-permittivity substrate, is adopted for bandwidth and gain benefits. Here, a pair of dielectric strips rather than a single one is placed above the coupling slot with 45° inclination for generating good CP radiation, and it is elaborately designed to provide three closely coupled CP modes, constituting a wide operating bandwidth. To facilitate the application in antenna array, a cavity-backed antenna design along with a $2 \times 2$ subarray are further presented. To verify the design, a subarray prototype is developed and tested at Ku-band for satellite applications, showing an impedance bandwidth of 25.1%, a wide 1 dB AR bandwidth of 15.6%, and a peak gain of 15.1 dBi.

41 citations

Journal ArticleDOI
TL;DR: In this article, a dielectric patch (DP) resonator with silver-coated slots is investigated for designing wideband low-profile antenna in this communication, where the low profile DPR can be treated as an anisotropic DRA for analysis.
Abstract: A dielectric patch (DP) resonator (DPR) with silver-coated slots is investigated for designing wideband low-profile antenna in this communication. The low-profile DPR can be treated as an anisotropic dielectric resonator (DR) for analysis. A new equation for calculating the effective dielectric constant of the DPR operating at the TM modes is proposed. Based on this, the anisotropic property is investigated to enhance the gain of DP antenna (DPA). It is found from the theoretical analysis that the resultant antenna is a good compromise between the traditional microstrip patch antenna (MPA) and dielectric resonator antenna (DRA) in terms of profile, gain, efficiency, and design freedom. By making full use of the multimode characteristic of the DPR, the silver-coated slots are introduced on the DP to shift high-order TM121 mode close to TM101 mode. As a result, the bandwidth of the antenna can be significantly expanded. For demonstration, the DPA element and $1\times4$ array prototype operating in the microwave band (5 GHz) are implemented and measured.

38 citations

Journal ArticleDOI
Tong Changwu1, Hui Tang1, Jiang Li1, Wen-Wen Yang1, Jian-Xin Chen1 
TL;DR: In this article, a differentially coplanar-fed filtering dielectric resonator antenna (DRA) is proposed for millimeter-wave applications, which can be manufactured with a single-layer laminate using standard printed circuit board technology.
Abstract: In this letter, a differentially coplanar-fed filtering dielectric resonator antenna (DRA) is proposed for millimeter-wave applications. To realize a low-profile design, a novel coplanar feeding method is presented by incorporating a dielectric resonator and its feeding structure in the same layer, which minimizes the assembly errors. The DRA is shaped by hollowing out the substrate and can be manufactured with a single-layer laminate using standard printed circuit board technology. The DRA operates at TE111 mode that is excited differentially by a pair of microstrip lines with metallic vias. The filtering function is obtained by etching two pairs of slots with different lengths in the ground plane, resulting in two radiation nulls at both upper and lower band edges. For demonstration, a prototype is designed, fabricated, and measured. Good agreement can be observed between simulated and measured results.

30 citations

Journal ArticleDOI
TL;DR: A novel technique to design a broadband circularly polarized dielectric resonator antenna (DRA) with a lattice structure is proposed for the first time and its reconfigurable version, which can operate in left-handed circular polarization, right-handed CP, and linear polarization states, has been further presented.
Abstract: In this paper, a novel technique to design a broadband circularly polarized dielectric resonator antenna (DRA) with a lattice structure is proposed for the first time. Two resonant modes of TE 111 and TE 211 can be simultaneously excited through a cross-slot to constitute a wide operating bandwidth. On this basis, its reconfigurable version, which can operate in left-handed circular polarization (CP), right-handed CP, and linear polarization (LP) states, has been further presented. The latter possesses a simple design procedure to implement the reconfigurability since all the reconfigurable feeding circuits are isolated from the radiating DRA by the ground plane and only five p-i-n diodes are needed. Besides, a Teflon-based template is adopted to solve the problem of dielectric blocks’ critical placement and alignment tolerances. A backed cavity based on substrate integrated waveguide technology is introduced to reduce the unwanted radiation from the surface wave. Measured results indicate that the reconfigurable prototype can achieve a 3-dB axial ratio bandwidth of 20.7% for CP states, an impedance bandwidth of 29.6% for LP state with a cross-polarization level of better than −20 dB, and a peak gain over 7.3 dBi for all states. The proposed antenna can be used for polarization diversity applications of the modern wireless system.

29 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a dual-band dual-polarized filtering antenna with high selectivity is proposed, where four slots at each side of a square radiating patch are etched with a microstrip line with open-circuit stepped-impedance resonators (OCSIRs).
Abstract: In this communication, a novel dual-band dual-polarized filtering antenna with high selectivity is proposed. By etching four slots at each side of a square radiating patch, dual operation bands as well as a natural radiation null between the two bands are observed. Another two radiation nulls are generated by introducing a novel feeding structure, which is composed of a microstrip line with open-circuit stepped-impedance resonators (OCSIRs). Thus, a dual-band bandpass filtering response of the realized gain is obtained. Each polarization of the antenna is differentially fed, and the differential port isolation is better than 37 dB. A prototype of the antenna element and a $1\times 4$ array is fabricated and tested to validate our design. Measured results show that the antenna element has dual operation bands of 3.28–3.71 and 4.8–5.18 GHz for VSWR < 1.5. Besides, a high out-of-band gain-suppression level which reaches 17.7 dB is also obtained. Good performance of the proposed antenna makes it a promising candidate for 5G sub-6 GHz base station systems.

113 citations

Journal ArticleDOI
TL;DR: In this paper, a differential dual-polarized filtering dielectric resonator antenna (DRA) is proposed to achieve high isolation for input ports, and the elaborately designed feeding strips ensure controllable input impedances for integration applications.
Abstract: This communication presents a differential dual-polarized filtering dielectric resonator antenna (DRA). In this antenna, a four-leaf-clover-shaped dielectric resonator is excited with two groups of out-of-phase modes. The novel configuration and differential feeding provide the DRA with high isolation for input ports, and the elaborately designed feeding strips ensure controllable input impedances for integration applications. After integrating with a pair of filtering baluns on the opposite side of the reflecting ground, the proposed DRA also exhibits good out-of-band rejection for each port with a wide stopband and two radiation nulls at band edges. A prototype has been designed and implemented, and reasonable agreement between the measured and simulated results can be observed.

80 citations

Journal ArticleDOI
TL;DR: A new differentially fed frequency reconfigurable antenna adopting proximity-coupling feeding for WLAN and sub-6-GHz 5G applications is proposed in this paper, and good agreement between the simulated and measured results is achieved.
Abstract: A new differentially fed frequency reconfigurable antenna adopting proximity-coupling feeding for WLAN and sub-6-GHz 5G applications is proposed in this paper. It consists of two substrates that are separated by a 2.5-mm-thick air gap. By configuring the four p-i-n diode switches arranged on the two substrates, the excitation of the radiating patch and the length of the feed-lines can be controlled, and then, two different operating frequency bands can be obtained. The experiments indicate that the designed antenna can be switched between two states operating at 2.45- and 3.50-GHz band, respectively. Good agreement between the simulated and measured results is achieved, and the radiation patterns and gains are similar for the two states. The proposed antenna is a good candidate for WLAN (2.45 GHz) and sub-6-GHz 5G (3.50 GHz) applications.

68 citations

Journal ArticleDOI
TL;DR: In this article, a glass dielectric resonator antenna (DRA) incorporating a liquid-metal polarizer capable of polarization reconfiguration is introduced, which operates at 2.4 GHz with a wide effective bandwidth (overlapped impedance bandwidths of the three states) of 18.0% and a high radiation efficiency of more than 80%.
Abstract: In this communication, we introduce a glass dielectric resonator antenna (DRA) incorporating a liquid-metal polarizer capable of polarization reconfiguration. The polarizer is formed by a type of liquid-metal alloy composed of gallium, indium, and tin. The antenna is capable of generating three different polarizations: a −45° polarization (STATE 1), a +45° polarization (STATE 2), and a $y$ -axis polarization (STATE 3). The glass DRA is designed to operate at 2.4 GHz with a wide effective bandwidth (overlapped impedance bandwidths of the three states) of 18.0% and a high radiation efficiency of more than 80%. The experimental results agree well with the theoretical analyses.

63 citations

Journal ArticleDOI
TL;DR: In this article, a differential-fed gain-enhanced dual-polarized dielectric patch antenna operating at higher order TM121 and TM321 modes is investigated, which not only moves the higher-order TM121 mode upwards to enhance the gain of the antenna, but also enables the higherorder TM321 mode to be excited and combined with TM121 modes to expand the bandwidth.
Abstract: A differential-fed gain-enhanced dual-polarized dielectric patch antenna operating at higher order TM121 and TM321 modes is investigated in this letter. The introduction of grounded bars in a conventional square dielectric patch resonator (DPR) is a key technique in the proposed design. It not only moves the higher order TM121 mode upwards to enhance the gain of the antenna, but also enables the higher order TM321 mode to be excited and combined with TM121 mode to expand the bandwidth. Their corresponding degenerate modes in the DPR are used to generate a dual-polarized operation. By using two identical pairs of differential feeding lines to excite the proposed DPR, several advantages such as high isolation and low cross polarization can be obtained. For demonstration, an antenna prototype centered at about 4.9 GHz is implemented and measured. The simulated and measured results are given, showing a good agreement.

44 citations