1,720,979 research outputs found
Postcard Shaped Super Wideband Antenna with High BDR
No full textThe design of a compact postcard-shaped antenna is presented for super wideband performance. The top side of the proposed antenna comprised of a modified rectangular patch, while an optimized partial ground plane with stair-shaped slots is designed on the bottom side, which helps to improve the impedance matching in the desired frequency range. The overall size of the antenna is 20 × 20 mm2. An impedance bandwidth of 27.25 GHz is observed starting from 2.75 GHz up to more than 30 GHz. Furthermore, the proposed antenna offers a fractional bandwidth of 166.4 %, a ratio bandwidth of 10.9: 1, and a bandwidth dimension ratio (BDR) of 5136. In addition, the observed peak gain of the proposed antenna is ∼ 5.56 dBi with an average gain of ∼ 3.4 dBi for the operating frequency range
A Modified Frequency Selective Surface Band-stop Filter for Ultra-wideband Applications
No full textA modified design of a single-layer ultra-wideband (UWB) Frequency Selective Surface (FSS) reflector is presented for microwave applications. The proposed FSS unit cell consists of a square-loop and a ring printed on opposite sides of a low-cost FR-4 substrate. With the optimized dimensions of the elements, the proposed FSS design provides a stop-bandwidth of 11.94 GHz (5.24-17.18 GHz). It is observed from simulation results that the proposed FSS design has a linear decreasing phase response in the desired band. Furthermore, the presented design provides a stable frequency response up to 45° oblique angle of incidence for both perpendicular (TE) and parallel (TM) polarizations
Stub-loaded Dual-Band Planar Antenna for 28/38 GHz 5G Applications
No full textA stub-loaded dual-band patch antenna design is presented for millimeter-wave 5G applications. Two techniques are integrated to design the antenna: first, an inset-fed rectangular patch is designed and then open-circuit stubs of quarter-wavelength are integrated with the feed line. The inset-fed patch has a frequency band of 38 GHz, whereas the stubs are designed to have a frequency band of 28 GHz. For reduced back radiations, a modified ground plane is utilized. This modification tends to enhanced antenna gain and efficiency, which are noted to be 5.5 dBi and 88%, respectively. For the validation of the proposed design, a prototype is fabricated and tested, and a reasonable agreement is observed between both the simulated and measured results
A compact planar antenna for super wideband applications
No full textThis paper presents the design of a planar antenna for super wideband applications. The proposed antenna design consists of a wine glass shaped patch radiator, a tapered microstrip feed line, and a groove-shaped ground plane. From the presented results it is observed that the use of a tapered feed line with a groove-shaped ground plane tends to achieve wide impedance bandwidth. Therefore, the proposed antenna configuration offers a ratio bandwidth of 11.3 : 1 in the frequency range of 3.1-35 GHz. Furthermore, the proposed planar antenna offers an acceptable gain with good radiation characteristics for the entire operating bandwidth
Multiband planar antenna for cellular and wireless applications
No full textA multiband planar antenna design is presented for cellular and wireless communications. The presented antenna realizes an overall size of 40×40×1.6 mm3. It consists of a Gshaped and inverted L-shaped radiator. The G-shaped radiator is responsible to offer 1800 MHz, 2.45 GHz, and 3.5 GHz frequency bands, while the inverted L-shaped radiator can provide resonance at 900 MHz and 5 GHz frequency bands. Moreover, the proposed multiband antenna offers good radiation characteristics and gain for desired frequency bands. The proposed antenna design is also fabricated and measured to validate the simulation results
Inset-fed planar antenna array for dual-band 5g mimo applications
No full text—An inset-fed planar MIMO antenna array has been presented for dual-band 5G applications. The proposed MIMO array offers numerous advantages such as compact size, planar structure, and high isolation. The single element of the array comprises an inset-fed rectangular patch and open circuit stubs designed on the top side of the substrate, while the bottom layer consists of a partial ground plane. Simulated and measured results show that the proposed antenna offers dual-band characteristics at 28 GHz and 38 GHz frequency bands, respectively. It has also been observed from the results that the proposed inset-fed planar antenna offers good radiation characteristics, acceptable gain, and radiation efficiency for both bands. Furthermore, a four-element-based MIMO antenna array has been designed for its possible use in 5G-enabled communication devices. It has been demonstrated that the proposed MIMO antenna provides high isolation between array elements without disturbing the characteristics of the individual antenna element. The proposed MIMO antenna array has been fabricated and measured for the validation of simulation results, and it has been observed that both the results are in good agreement
Double overt-leaf shaped cpw-fed four port uwb mimo antenna
No full textThis paper presents a 4 × 4 multi-input multi-output antenna array for ultra-wideband applications. The single element of the array is comprised of a modified co-planar waveguide-fed double overt-leaf shaped patch radiator. The co-planar ground is optimized to achieve maximum impedance matching in the operating frequency band. The results show that the single antenna element offers an impedance bandwidth of 13.2 GHz starting from 3.2 GHz to 16.7 GHz. It is also observed from the results that the antenna offers good radiation characteristics and acceptable gain for the frequency band of interest. Furthermore, a 4 × 4 MIMO array is designed by utilizing the polarization diversity technique. To improve the isolation performance among antenna elements, a fan-shaped decoupler is introduced on the other side of the substrate, which ensures minimum isolation of 20 dB. Moreover, the proposed MIMO array operates in the frequency range of 2.75– 16.05 GHz. The proposed MIMO array is fabricated and measured for the validation of simulation results, and it is observed that both the results are well in agreement
A Low-Cost Dual Band Integratable Antenna for Sub-6GHz Applications
No full textIn this paper, a low-cost antenna with dual band characteristics has been presented. For the first band, the proposed antenna fully covers 2.45 GHz, Wireless Local Area Network (WLAN) and Industrial, Scientific, and Medical (ISM) band covering 2.4 - 2.5 GHz band with impedance bandwidth better than -14dB. For the second band, it offers impedance bandwidth w.r.t. better than -14dB for public safety applications. Moreover, the second band also covers 4.8-5.2 GHz band w.r.t. - 10dB impedance bandwidth. It is designed using FR-4 low-cost substrate with thickness of 0.8mm. Moreover, it exhibits good radiation characteristics in terms of radiation patterns and gain. The shape and compactness of antenna allow its easy integration to sub-6GHz devices and IoT applications
Semi-Ring Patch Array Antenna for High Gain 28 GHz Applications
No full textA patch array antenna design for millimeter-wave 28 GHz applications is presented in this article. The front-side of the proposed design is comprised of a 1×2 array of semi-ring radiating elements excited using a conventional T-junction corporate feeding network, while the back-side consists of a full ground plane. The designed patch array demonstrates a wide impedance bandwidth (1.75 GHz), ranging from 27.5 GHz to 29.25 GHz. Furthermore, a peak gain of ≥9.5 dBi with an antenna efficiency of >80% is observed within the operating bandwidth
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