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A Low-profile Wide Band “S” Shaped Rectangular Dielectric Resonator Antenna for “X” Band Application
摘要： The main goal of this article is to design a low-profile wide band Rectangular Dielectric Resonator Antenna (RDRA). The proposed “S” shaped rectangular DRA is excited by means of a popular microstrip line feeding. By using “S” shaped design, our proposed DRA yields an impedance bandwidth of 32% from 9.2 to 12.48 GHz, covering “X” band frequency. The proposed antenna has a wide impedance bandwidth, extremely low profile with the volume of 447 mm3, and a thickness equal to 2.5 mm. This design provides stable radiation patterns and high radiation efficiency. The proposed design is compared with some other designs in the literature in order to emphasize its significance. The proposed RDRA was fabricated and its characteristics were tested. Excellent agreement between simulated and measured ones was obtained.
关键词： Radiation pattern,Rectangular dielectric resonator antenna (RDRA),Low profile,X band,Impedance bandwidth
更新于2025-09-23 15:19:57
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Slotted waveguide antenna with central trapped wave effect
摘要： A new slotted waveguide antenna is proposed in this paper, which opens eight parallel slots along the longitudinal axis at the broad wall of the waveguide as radiation output facets. It has compact slot structure, which greatly reduces the size of the antenna, and the overall longitudinal size of the parallel slot facet is merely 3.8 mm (just slightly larger than half of the operating wavelength). The slot linear array design of the antenna achieves the central trapped wave radiation effect, avoids energy consumption at communication discontinuous zone, and enhances radiation efficiency. The operating bandwidth could be up to 10 GHz, with the center frequency of 85 GHz. The measured results match well with simulated results, and the gain is slightly higher than 9.0 dBi within the whole operating frequency range. The antenna has features of compact longitudinal structure, wide frequency band, stable gain, etc., and will have good application prospects in wireless communication.
关键词： central trapped wave,wide impedance bandwidth,Compact slot structure
更新于2025-09-19 17:13:59
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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Design and Analysis of Circularly Polarized Defected Ground Elliptical Patch Antenna for Long Term Evolution (LTE) and 4G Wireless Applications
摘要： In this article the strategy and analysis of a defected ground stacked elliptical patch microstrip antenna (EPMA) is presented for circular polarization (CP). This antenna gives an impedance bandwidth of 44.0% with respect to resonant frequency 1.98GHz, which is eight times greater in comparision to conventional elliptical patch microstrip antenna (EPMA) along with axial ratio bandwidth of 5.5% with reverence to frequency 1.98GHz. The antenna is studied on a Flame Retardant (FR-4) substrate having substrate permittivity 4.4 and thickness 1.59mm. The CP behaviour is observed by truncating the conventional elliptical patch and inserting slots. A square slot is also etched in ground plane at an angle of 45 degrees with respect to horizontal axis. This antenna design having a dimension of ground plane 35.0×32.0 mm2. To achieve the higher impedance bandwidth, the technique of multilayer stacked of patch is used. The over all height of antenna is 9.18mm. This antenna can be used in Long Term Evolution (LTE) and 4G Wireless Applications.
关键词： circularly polarized (CP) antenna,Elliptical microstrip antenna (EPMA),impedance bandwidth (IBW),defected ground (DG) technique,multi-layered stacked structure,axial ratio bandwidth (ARBW)
更新于2025-09-09 09:28:46
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DESIGN ANALYSIS AND MODELING OF DIRECTIONAL UWB ANTENNA WITH ELLIPTICAL SLOTTED GROUND STRUCTURE FOR APPLICATIONS IN C- & X-BANDS
摘要： A modi?ed technique to design directional ultra-wideband (UWB) antenna with slotted ground structure approach on the ground plane has been presented for applications in C- and X-bands. Initially, elliptical slot is inserted into ground and thereafter, the axis of ellipse is rotated 45 degrees in direction of the substrate. Minor axis of the ellipse is optimized to locate it symmetrically around the circular patch in order to obtain the full C- and X-band operations and also to enhance directivity. Thereafter, for further improvement in the directivity as well as gain, an elliptical slot in circular patch has also been introduced. The impedance bandwidth approximates about 95% covering the frequency ranging from 4.18–11.50 GHz. The return losses (S11) are ?38 dB and ?43 dB through simulation, which are ?24 dB and ?32 dB by measurement at 6.3 GHz, 9.3 GHz resonant frequencies, respectively. Simulated gain and half power beam width (HPBW) are 2.5–8.4 dB and 49–22 degrees in 4.18–11.50 GHz band, respectively. Gain and half power beam width (HPBW) of the proposed antenna improves by 1–2 dB and 5–10 degrees, respectively compared with previously designed antennas. Simulation of the antenna has been carried out on Computer Simulation Technology (CST) software on an FR-4 substrate having dielectric constant 4.3 of thickness 1.6 mm. The measured results show good agreement with equivalent circuit model and CST simulation.
关键词： C- and X-bands,impedance bandwidth,elliptical slot,directional ultra-wideband (UWB) antenna,slotted ground structure,directivity,gain
更新于2025-09-09 09:28:46
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Design and Performance Analysis of an UWB Patch Antenna with Enhanced Bandwidth Characteristics
摘要： This paper presents a monopole ultra-wideband (UWB) patch antenna with enhanced bandwidth performance. The reference antenna has a square radiator and fed by a microstrip feed line. The other side of the substrate has a partial ground plane. A trapezoidal slot configuration with proper dimension has been inserted to upper edge of the partial ground plane under the feed line to modify the reference antenna bandwidth characteristics. Additionally, two rectangular shapes have been cut from the edge of the square patch to add another bandwidth improvement. The simulation results prove that the antenna fractional bandwidth of the reference antenna is 122.49 % while for the final antenna model is 147.28 %. The antenna maximum gain, radiation characteristics, radiation efficiency, and group delay characteristics are also investigated.
关键词： monopole antenna,radiation patterns,impedance bandwidth,ultra-wideband
更新于2025-09-04 15:30:14