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Jingdong Chen

Bio: Jingdong Chen is an academic researcher from Northwestern Polytechnical University. The author has contributed to research in topics: Dielectric resonator antenna & Beamwidth. The author has an hindex of 1, co-authored 4 publications receiving 3 citations.

Papers
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Journal ArticleDOI
TL;DR: A novel widebeam aperture-coupled cylindrical dielectric resonator antenna that excites fundamental and high order hybrid modes inside the DR to achieve wide beamwidths in the two principal planes simultaneously.
Abstract: A novel widebeam aperture-coupled cylindrical dielectric resonator antenna is proposed, which consists of multi-layered cylindrical ceramic disks joined together to achieve the required height. The proposed antenna is fed by wide aperture slot, which, along with optimum dielectric resonator height, excites fundamental and high order hybrid modes inside the DR to achieve wide beamwidths in the two principal planes simultaneously. Then, a new frequency, which is called the limited frequency and denoted as $f_{\mathrm {L}}$ , is defined. Based on $f_{\mathrm {L}}$ , dimensions of the wide slot are determined. Finally, the antenna is manufactured and measured. Its operating frequency band ranges from 5.49 GHz to 7.2 GHz. The antenna yields broadbeam in the frequency band from 6.1 to 6.7 GHz and achieves a 3-dB beamwidth from 124° to 149° in the E-plane and from 112° to 126° in the H-plane.

12 citations

Journal ArticleDOI
TL;DR: A novel broadbeam aperture-coupled step-walled rectangular dielectric resonator antenna that consists of a central widest ceramic plate with two plates on each side with decreased widths creating stepped or staircase like walls is proposed.
Abstract: Wide angular coverage antennas despite being a requirement for many recent safety applications are a design challenge. Applications like Automotive Radars, GPS and telemetry all need an antenna wit...

5 citations

Proceedings ArticleDOI
04 Aug 2019
TL;DR: In this article, an acute isosceles triangular dielectric resonator antenna is proposed which yields wide beamwidths in E- and H-plane, simultaneously, using a wide aperture slot, which simultaneously excites the first two lower order modes.
Abstract: A novel ${\text{TM}}_{101}^{\text{z}}$ acute isosceles triangular dielectric resonator antenna is proposed which yields wide beamwidths in E- and H-plane, simultaneously. The antenna is fed by a wide aperture slot, which simultaneously excites the first two lower order modes. Then Mode-I frequency is identified using HFSS Eigen Mode solver. With the use of Mode-I frequency, dielectric resonator height is calculated which is a key parameter for identifying the broadbeam yielding band of frequencies. Its optimal value is found out to be 0.105λm. Proposed antenna operates in frequency band of 2.03 GHz to 3 GHz and yields E- and H-plane beamwidths ranging from 134° to 138° and 120° to 123°, respectively. The antenna is broadbeam in the frequency band from 2.03 GHz to 2.3 GHz.
Proceedings ArticleDOI
01 Aug 2019
TL;DR: In this article, a TMz 101 broadbeam acute isosceles triangular dielectric resonator antenna is presented, where the antenna is fed by a wide aperture slot, which simultaneously excites the first two lower order modes.
Abstract: A novel TMz 101 broadbeam acute isosceles triangular dielectric resonator antenna is presented. The antenna is fed by a wide aperture slot, which simultaneously excites the first two lower order modes. With the help of Mode-I frequency, dielectric resonator height is calculated which is $0.105 {\lambda}_{\mathrm{m}}$ and plays a key role in yielding wide 3 dB beamwidth radiation patterns. A comparison of broadbeam antenna fed by aperture slot and a probe is made which shows that optimal feed mechanism for broadbeam operation is aperture slot. Then, metal perturbation is introduced within the dielectric resonator at height of 6mm to improve the co- to cross polar isolation by 10 dB. Proposed antenna operates in the frequency band of 2.03 GHz to 3 GHz and yields E-plane beamwidths from 134° to 138° and H-plane beamwidths from 120° to 123°. The antenna is broadbeam in both planes in the frequency band from 2.1 GHz to 2.3 GHz.

Cited by
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Journal ArticleDOI
Zhengyi Yang1, Na Kou1, Shixing Yu1, Fei Long1, Lili Yuan1, Zhao Ding1, Zhengping Zhang1 
TL;DR: In this paper, a reconfigurable polarization conversion method based on a metasurface turned by PIN diodes is proposed, which consists of one layer of a dielectric and two layers of metal surfaces.
Abstract: A novel reconfigurable polarization conversion method based on a metasurface turned by PIN diodes is proposed herein. The proposed metasurface consists of one layer of a dielectric and two layers of metal surfaces. When the diode is in an OFF-state, a wideband linear to circular (LTC) polarization converter is realized. The results show that the metasurface can achieve LTC polarization conversion in the frequency range of 11.8–24.1 GHz, and the axial ratio (AR) reveals that the 3-dB bandwidth is approximately 68.5%. When the diode is in the ON-state, a dual-band linear to linear (LTL) polarization converter is realized, with the 3-dB bandwidths of 10.5–13.9 GHz and 17.7–27.2 GHz, achieving a polarization converter ratio (PCR) greater than 90%. The dc bias circuit of the PIN diode is etched on the reflectance surface. Therefore, no additional feeding lines are introduced, which can decrease the impact on the active metasurface; this metasurface has practical applications in microwave communication systems.

37 citations

Journal ArticleDOI
TL;DR: In this paper, a dual-band dielectric resonator antenna exhibiting circular polarization at a high-frequency band of (7.85 GHz-7.93 GHz) in addition to linearly polarized lower frequency bands of (5.12 GHz-5.49 GHz) was designed for weather radar applications.
Abstract: This paper documents a novel design of dual-band dielectric resonator antenna exhibiting circular polarization at a high-frequency band of (7.85 GHz–7.93 GHz) in addition to linearly polarized lower frequency band of (5.12 GHz–5.49 GHz) using new materials, sapphire, and TMM13i for antenna design. With sapphire and TMM13i being immune to physical change, the novel design is suitable for weather radar applications. The obtained circular polarization reduces signal attenuation. A four-layered structure with sapphire and TMM13i stacked alternatively with aperture coupled feed is presented. Additionally, the corners of the patch have been truncated, and a slot has been etched in order to obtain the dual-band resonance and circular polarization respectively. The design is simulated using Ansys HFSS and fabricated for measurements. The VSWR (Voltage standing wave ratio) is measured to be less than 2 for both the bands. The simulated and measured gains of the antenna are 5.2 dBi and 4.9 dBi, respectively.

6 citations

DOI
TL;DR: In this paper , a novel metamaterial-loaded, miniaturized, broadband, wide-beam dielectric resonator (DR) antenna is presented for low-cost wide-angle beam-scanning applications.
Abstract: A novel metamaterial-loaded, miniaturized, broadband, wide-beam dielectric resonator (DR) antenna is presented for low-cost wide-angle beam-scanning applications. The mushroom structure is loaded on the DR structure, so the proposed DR radiator reduces the size reduction (low profile, $0.09\lambda _{0}$ ) and achieves a broadened bandwidth with a dual-mode response. The realized 3 dB beamwidth of the DR radiator is widened from 90° to 194° by introducing a pair of miniaturized equal-amplitude and out-of-phase Huygens sources. Owing to its compact size and wide beamwidth, a five-element low-cost wide-angle beam-scanning phased array is presented by using the proposed wide-beam DR elements. The measured −10 dB impedance bandwidth covers the 5G-78 band well (3.30–3.80 GHz, 14.1%). The realized scanning angle of the fabricated linear array can be extended from ±36° to ±65°, and its 3 dB beamwidth scanning coverage can up to ±90°. In virtue of miniaturized size, wideband, low cost, and good beam-scanning ability, the presented element, and the resulting wide-angle beam-scanning array are promising candidates for wireless communication and low-cost phased array applications.

2 citations

Journal ArticleDOI
TL;DR: In this paper , a dielectric resonator antenna (DRA) with simple configurations but an ultrabroad beam is proposed by combining the characteristic modes (CMs) from the Dielectric block and ground.
Abstract: A dielectic resonator antenna (DRA) with simple configurations but an ultrabroad beam is proposed by combining the characteristic modes (CMs) from the dielectric block and ground. To accurately identify these CMs, an effective design methodology based on the surface integral equation-based substructure characteristic mode analysis is developed. Compared to the traditional CM-based DRA design approach, this new method provides much more useful modal information by eliminating spurious modes and mode mixing. The wide-beam DRA is then designed by selecting a set of higher-order CMs with complementary radiated beams and adjacent resonant frequencies. The results from full-wave simulation and measurement are also displayed. Good consistency is observed.

2 citations

Journal ArticleDOI
07 Sep 2020-Frequenz
TL;DR: In this article, a beam control and beam width control technique for smartdielectric resonator antenna (DRA) having beam control mechanism is proposed. But the beam width is not considered.
Abstract: Abstract Smartdielectric resonator antenna (DRA) having beam control mechanism is anew area to be explored by antenna researchers. Proposed new geometry DRA has low loss, design flexibility, high efficiency, compact size and desired radiated beam control. Developing beam control in new geometry DRAs is investigated for the first time in this letter. Unique technique for beam control and beam width control is proposed using pit top and mount top DRA. Gain is controlled from 5.0 to 9.98 dBi and beam is controlled from ±30° to ±70° in broadside radiation pattern. U shape pit DRA has maximum directive gain of 9.98 dBi and efficiency 98% at 5.8 GHz frequency. Measured and simulated results of radiation pattern and reflection coefficient are found to be in close proximity. Hardware of U shape pit top DRA, mount top DRA, left side arc top DRA, right side arc shape top DRA is developed and investigated. Mobile and cellular communication network need wide coverage, hence large beam width is required. Narrowing of beam width at higher order mode is also achieved.

1 citations