“…4(a), these lines are represented as parallel RLC combinations. Their values are obtained using equations (2)–(4) reported in [18]. where R 1 , L 1 , and C 1 are the equivalent parameters of the outer ring whose radius is ( b + g ),Fig.…”
Section: Unit Cell Design and Characterizationmentioning
confidence: 99%
“…4(a), these lines are represented as parallel RLC combinations. Their values are obtained using equations ( 2)-(4) reported in [18].…”
A linearly polarized dual band reflectarray (RA) antenna designed, fabricated, and tested to operate in the Ku and K band frequencies is reported in this paper. The 24 × 24 cm2 size RA is developed using 1058 integrated elements etched over a 0.275 mm thick Rogers RT5870 substrate. The integrated elements include concentric circular rings distributed co-centric with the source and the Malta cross elements distributed offset from the source. The distribution of these elements is done based on the 590 and 360° phase change observed at 14.25 (Ku) and 22.5 (K) GHz by varying the size of the circular rings and the Malta cross respectively. The designed RA offers a simulated gain of 28.62 dBi at 14.25 GHz and 26.92 dBi at 22.5 GHz. These results are validated experimentally using the fabricated prototype. A measured peak gain of 28 and 26.4 dBi are observed with sidelobe levels (SLL) of −21 and −11 dB at 14.25 and 22.5 GHz respectively. The cross-polarization levels measured at the resonant frequencies are <−31 and <−28 dB. The proposed dual-band RA covers the entire Ku band uplink frequencies utilized for fixed satellite services and the K band downlink frequencies useful for earth exploration satellite services.
“…4(a), these lines are represented as parallel RLC combinations. Their values are obtained using equations (2)–(4) reported in [18]. where R 1 , L 1 , and C 1 are the equivalent parameters of the outer ring whose radius is ( b + g ),Fig.…”
Section: Unit Cell Design and Characterizationmentioning
confidence: 99%
“…4(a), these lines are represented as parallel RLC combinations. Their values are obtained using equations ( 2)-(4) reported in [18].…”
A linearly polarized dual band reflectarray (RA) antenna designed, fabricated, and tested to operate in the Ku and K band frequencies is reported in this paper. The 24 × 24 cm2 size RA is developed using 1058 integrated elements etched over a 0.275 mm thick Rogers RT5870 substrate. The integrated elements include concentric circular rings distributed co-centric with the source and the Malta cross elements distributed offset from the source. The distribution of these elements is done based on the 590 and 360° phase change observed at 14.25 (Ku) and 22.5 (K) GHz by varying the size of the circular rings and the Malta cross respectively. The designed RA offers a simulated gain of 28.62 dBi at 14.25 GHz and 26.92 dBi at 22.5 GHz. These results are validated experimentally using the fabricated prototype. A measured peak gain of 28 and 26.4 dBi are observed with sidelobe levels (SLL) of −21 and −11 dB at 14.25 and 22.5 GHz respectively. The cross-polarization levels measured at the resonant frequencies are <−31 and <−28 dB. The proposed dual-band RA covers the entire Ku band uplink frequencies utilized for fixed satellite services and the K band downlink frequencies useful for earth exploration satellite services.
“…Apart from this, a defected structure [7][8][9][10][11][12][13][14][15][16][17] is considered on patches and grounds for effective and simple methods to miniaturize the antenna size and to attain additional resonant modes. A crescent-shaped planar monopole antenna 7 is proposed with defected ground structure (DGS).…”
Section: Introductionmentioning
confidence: 99%
“…A Y‐shaped strip with circular ring and DGS, 8 a hexadecagon‐shaped patch antenna, 9 and dual polygonal slits on planar square‐shaped antenna 10 were designed for multiple frequency bands. The single patch, enhancement of gain with concentric circles patch, 11 and a half circular patch (HCP) antenna were considered 12 for dual frequency. An array geometry with EBG structure 13 was designed for decreasing the mutual coupling.…”
The investigation of two half circular patch (HCP) antenna with defected ground structure to operate dual bands is presented in this study for wireless communications. The crescent slots etched on the HCPs are proposed to operate the dual bands of below −10 dB reflection coefficient, with the impedance bandwidth of the first band being 740 MHz (3.01–3.75 GHz) and of the second band being 7120 MHz (6.74–13.86 GHz). The proposed HCP antenna was resonates of 3.36 and 12.17 GHz with −33.9 and −35.47 dB reflection coefficients. This antenna produces a maximum gain of 5.46 and 6.61 dB for these resonating frequencies, respectively. The simulation and measured radiation pattern results are also presented for proposed HCP antenna and it operates for wireless communications and internet of things applications.
“…Similarly, in Vivek et al, 11 a meander-shaped patch was designed for narrow bandwidths of 150 and 370 MHz and produces a minimum gain of 5.3 and 3.44 dB, respectively. The monopole radiator with a y-shaped, [12][13][14][15] meander-loaded monopole antenna, 16 rectangular patches with U-shaped slots, 17 were designed for wireless communication. In Dastranj et al, 18 the antenna operates for S, C, X, and Ku-bands which produce a maximum gain of 5 dB at the 15 GHz frequency band.…”
In this paper, a novel compact patch antenna is presented for wireless communication applications. The proposed antenna has three T‐shaped patches (TSP) connected to the feed line and crossed I‐slots are etched on the ground plane to operate a single resonating band with low interference. The TSP antenna operating frequency is 10.98 GHz with an impedance bandwidth of 850 MHz, a reflection coefficient of −38.11 dB, and a gain of 6.44 dBi. The radiation patterns are also presented for E‐plane and H‐plane. The proposed TSP antenna model is fabricated and tested. Good agreement is achieved with simulated and measured results.
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