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This paper examines a two-dimensional (2-D) parallel-plate parabolic reflecting structure to implement the Beam forming network (BFN) for the directional beam radiation of phased array of antennas, which is realized in the substrate integrated waveguide (SIW) structure. To further reduce the intrinsic insertion loss of dielectric substrate, the air cavity technique is utilized for electromagnetic...
Long Term Evolution (LTE) is the latest standard in mobile networking technology. A monopole antenna for LTE, using three resonance routes, fabricated on 0.8mm thick FR4, is proposed in this work. The radiator length, inductor circuit and coupling were tuned to get the operation frequency, and it is suitable for the LTE700/GSM900/GSM1800/GSM1900/UMTE2100/LTE2600. Simulator HFSS and vector network...
This paper proposes a PIFA type MIMO antenna at WLAN band for dongle application. The MIMO antenna consists of two identical PIFA antennas on both ends of an FR4 substrate and operates a frequency band at 2.45 GHz. A T-shaped element that is extended from system ground and a neutral line located on back side of the substrate are used to increase isolation between the two PIFAs. The neutral line is...
This paper designs a monopole antenna on a commonly used FR4 substrate with width of 0.8 mm. The overall dimensions of the proposed antenna are 45×94.5 mm2, which can be easily applied in today's mobile devices. With small size of radiation element (45×12 mm2), the proposed antenna consists of three resonant paths that operate three resonant bands. By carefully adjusting the length of antenna paths...
A novel antenna designed for the RFID reader with circular polarization (CP) operation is proposed in this paper. The antenna contains a 50-Ω microstrip feed line, two resonant paths on the top substrate, and a system ground on the bottom substrate. Experimental results show that good CP radiation performances of the proposed design are obtained, and both the impedance bandwidth and 3-dB axial-ratio...
A novel planar monopole antenna with an inverted-U-shaped element and a meander low-frequency path is developed and proposed. By adjusting the size of inner ground strip and the gap between inverted-U element and the outer ground strip, the high-frequency band can be applied in DCS1800, PCS 1900, UMTS2000, and WLAN systems. The meander line, outer ground strip, and extended stub are used for increasing...
The novel design of open-slot broadband antenna with dual band-reject characteristics have been proposed. And the proposed antenna has a small size of 24 times 35 mm2. Firstly, the broadband antenna has a large bandwidth of 95.5% was designed. By etching two slits of different length on the ground plane to reject the two dispensable bands for WiMAX applications. The tri-band design has been obtained...
In this paper, we propose a novel design of enhancement bandwidth and band- rejection function for small open slot antenna. The measured and simulated results show that the proposed design has a very wide impedance bandwidth of 130% (from 2.3 to 10.9 GHz) and a band-rejected characteristic. The proposed method also has a very simply structure and proves to be a good candidate for low-cost small open...
The novel design of broadband and triple-band T-type monopole antenna for WiMAX applications has been proposed and studied. The proposed antenna has a compact size of 28 times 26.4 mm2. For the wideband performance of the proposed antenna, the dimensions of the notches on the ground plane and the T-type radiation patch have been studied by parameter analysis. Furthermore, embedded a narrow inverted-L...
In this paper, we proposed a novel design to further enhance impedance bandwidth by varying the shape of the open slot. The measured bandwidth of the proposed antenna defined by return loss >10 dB is about 130%, from 2.3 to 10.9 GHz. The proposed open slot antenna will be implemented, and the detail antenna design and experimental results are presented and discussed.
In this paper, a dual-band rejected design for cross monopole antenna is proposed and experimentally studied. To achieve wide and dual-band rejected operation, the proposed antenna consists of a UWB cross monopole antenna and the small h-shaped slots, producing dual band-rejected characteristics, maintaining wideband performance, and good omnidirectional radiation pattern. Details of the results for...
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