Showing papers on "Feed line published in 2023"
TL;DR: In this article , the voltage standing wave ratio (VSWR) of a truncated spiral antenna was analyzed for input impedance matching a coaxial line and it was found that the spiral antenna has an axial ratio bandwidth of 24%, where the VSWR remains less than two using parallel feedlines with a quasi-balanced feed.
Abstract: Curl and truncated spiral antennas are studied for input impedance matching a coaxial line. Each antenna is located at quarter wavelengths above the ground plane and analyzed using the moment method. It is found that the curl antenna shows a voltage standing wave ratio (VSWR) of less than two in a 3-dB axial ratio bandwidth of 30% using a crank feedline with an unbalanced feed. It is also found that the spiral antenna has an axial ratio bandwidth of 24%, where the VSWR remains less than two using parallel feedlines with a quasi-balanced feed.
01 Jan 2023
TL;DR: In this article , a novel design for the UWB printed monopole antenna which functions over a wideband from 2 to 10.6 GHz for the voltage standing wave ratio (VSWR) < 2.
Abstract: It is admitted that the WLAN and WiMAX networks encounter interference triggered by the UWB systems’ frequency range. Moreover, it is highly demanding to enhance the data transfer rate and the transmission quality of the (UWB) wireless communication. To get a higher quality in transmission between all kinds of planar antennas, monopole antennas have received much attention. A novel design has been introduced [the current research for the UWB printed monopole antenna which functions over a wideband from 2 to 10.6 GHz for the voltage standing wave ratio (VSWR) <2. In order to obtain the required enhancement for the impedance bandwidth of the recommended antenna, a couple of amendments have been presented. Primarily, the ground plane edges were chamfered with a radius of 5 mm. Secondly, the patch and a feeder line were shifted. The properties of the Quad-band notched were attained via employing a line-shaped slot, a semi U-shaped slot in the radiating patch and twofold incision a U-shaped slot implanted in a Ground antenna, in that order. The mentioned bands include 2.045–2.29, 3.4–4.66, 5.6–6.06 and 8.84–10.6 GHz utilized for the S-band, WiMAX, WLAN and RN-band with the ITU-8 band operations. It is of note that the slots lengths and widths prevail the center frequency is 5.2, as well as the notch bands’ widths. The recommended antenna has exhibited numerous merits in comparison with the other newly suggested band notch antennas. In further details, it is advantaged for its compact size while having a less complicated structure. Furthermore, it enjoys a wide bandwidth as well as superior band-notch characteristics.
26 Jan 2023
TL;DR: In this article , a triple Y-fed dual substrate aperture coupled microstrip antenna that operates in C, X, and Ku bands is presented, where the antenna has four layers with two dissimilar substrates.
Abstract: The design work presents a triple Y-fed dual substrate aperture coupled microstrip antenna that operates in C, X, and Ku bands. The overall dimension of the antenna is 50*40*1.894 mm. The antenna has four layers with two dissimilar substrates. A unique triple Y-structured feed line connected to a quarter-wave transformer forms the first layer of the design and shows a greater impact on impedance matching. A superimposed modified defected ground structure is sandwiched between two dissimilar substrates, FR4 and RT5880. The FR4 substrate is placed above the triple Y feed structure over which superimposed DGS is placed to obtain enhanced bandwidth. The third layer is formed by placing the second substrate RT5880 above the ground plane. The dielectric constant of the lower substrate is considered higher than the upper substrate to avoid undesired radiations at unwanted frequencies. A patch with three rectangular slots is placed over the RT5880 substrate for having tri-band characteristics. The patch is excited effectively through the slots in the ground plane thereby enhancing the coupling between the patch and the feed resulting in maximum radiation of RF energy. With this, an enhanced bandwidth of 12.66%, 16.67%, and 7.19% in all three bands is attained. Besides, the proposed design has a gain of 3.265 dBi at the C band, 3.305 dBi at the X band, and 4.385 dBi at the Ku band. The fabricated antenna is tested and the results are compared for both simulated and measured values. The results emphasize that a tri-band antenna can be used effectively in operating frequencies including the 5G wireless application band.
TL;DR: In this paper , a 2-elements structure with a single element and two polarized elements for UWB-MIMO wireless applications is designed and analyzed using the CST package, which supports four PIN diodes for frequency tuning and controls the frequency band from UWB band to narrowband through ON/OFF states.
Abstract: A new compact frequency tuning antenna with a single element and two polarized elements for Ultra-Wideband Multi Input Multi Output (UWB-MIMO) wireless applications is designed and analyzed using the CST package. The proposed antenna supports four PIN diodes for frequency tuning and controls the frequency band from UWB band to narrowband through their ON/OFF states. The proposed 2-elements structure is designed using FR4 substrate with overall dimensions of (30x60x1.6) mm3, the relative permittivity of 4.3, microstrip line feed with 50 Ω, and the antenna comprises patch element with an elliptical-shaped of radii of (10, 8) mm, two stubs with equal dimensions of (10x4) mm2 connected to the microstrip line feed by PIN diodes and half elliptical GND plane with radii of (15, 7) mm. The proposed antenna operates with three frequencies with bands under (S11 ≤ -10 dB) from (3-9.65) GHz, (6.13-7.21) GHz, and (5.45-7.6) GHz according to the PIN diodes states. These bands can be used to cover UWB, Satellite, and WiMAX applications. The maximum gain is 4.2 dB and the lowest return loss is -46 dB at 6.68 GHz. The performances behind this design are less than 0.022, around 10, less than -20 dB for the Envelope-Correlation-Coefficient (ECC), Diversity-Gain (DV), and Isolation respectively.