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patch antenna bandwidth enhancement There are numerous references to u-slots in patches as bandwidth enhancers in the IEEE Transactions on Antennas and Propagation. I have occasionally found slots and various cutouts helpful and they can enhance bandwidth. The MTT Transactions also have related references. The U-slot patch antenna, a single-layer single-patch antenna on a relatively thick substrate $(sim 0.08lambda _0)$ , is a wide-band antenna with an impedance bandwidth in a range of 20%–30% It consists of a rectangular patch with U-shaped slot on one side of the substrate and a finite ground plane on the other side. Design of U-Slot Patch Antenna and its Geometry The U-slot patch antenna produces a wideband beam. The U-slot microstrip patch antenna is designed at 2.0 GHz on Arlon diclad 880 substrate (Ԑr1=2.2, h1=1.6 mm), using expressions available in the standard literature [1-6, 13, 14]. For this proposed antenna, size of ground plane is (L X W) 90 X 100 mm and thickness of dielectric substrate is 3.2 mm with ε r = 2.2.The geometry of H slot patch antenna is shown in table 1.The geometry of rectangular microstrip patch antenna with H-slot is presented in Fig.1(a) with top view and Fig. 1(b) with 3D Geometry. In this paper, two microstrip antennas with a U-slot on the patch are presented for base station applications to provide simultaneous communications for uplink and downlink respectively. The intended antennas are expected to operate in triple bands, i.e., to cover GSM and LTE bands.

The U-slot patch antenna, a single-layer single-patch antenna on a relatively thick substrate $(sim 0.08lambda _0)$ , is a wide-band antenna with an impedance bandwidth in a range of 20%–30%

It consists of a rectangular patch with U-shaped slot on one side of the substrate and a finite ground plane on the other side. The antenna should resonate at 2.5GHz but the results show that it resonates at 2 Fig 77Elevation pattern Gain display Fig 88VSWR of "U" shaped slot VSWR observed is 11.13dB at 4.02 GHz. This value is higher than that is required. .

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Dual-band U-Slot Patch Antenna Define Parameters To achieve dual-band behavior as shown in [1], [2], the double resonance is modified such that the two contributing resonances, i.e. from the patch and from the slot do not merge. patch antenna having pair of slits had achieved impedance bandwidth of 24% and peak gain of 7.2 dBi had reported in [1]. A single U slot [2] has achieved impedance bandwidth upto 47% using thick probe, whereas double U slot using thick probe [3] it has achieved impedance bandwidth upto 44%. By using the method of stacking The microstrip antenna having single u-shaped slot on the patch is fed by 50Ω microstrip line and the main advantage of using the microstrip line feeding is that its ease of fabrication and the impedance matching is simple by controlling the inset cut position and the method is relatively simple. DESIGN PARAMETERS: May 18, 2010 · Abstract: The U-slot patch antenna was originally developed as a single-layer, single-patch wideband antenna. It has recently been shown that it can also be designed to perform a number of other functions. In this paper, a comprehensive account is given on the development of this antenna.

antenna is designed to have the center frequency of 28 GHz for 5G application. The proposed antenna consists of 16 rectangular patch es with microstrip line feed networ k. The patch antennas are arrayed in 4Ø4 formation to obtain a high gain and U -shape slots are utili zed to increase the bandwidth. 2. Antenna Design

The antenna should resonate at 2.5GHz but the results show that it resonates at 2 Fig 77Elevation pattern Gain display Fig 88VSWR of "U" shaped slot VSWR observed is 11.13dB at 4.02 GHz. This value is higher than that is required. . The U-slot patch antenna was originally developed as a single-layer, single-patch wideband antenna. It has recently been shown that it can also be designed to perform a number of other functions. A small wideband patch antenna with a modified half U-slot is presented. The antenna has an impedance bandwidth of 40% $({ S}_{11}<-10 {hbox{dB}})$, which is from 1.72 to 2.58 GHz.