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By integrating a pair of short sleeves into the system ground plane of a wireless USB dongle, the improved radiation patterns of a printed monopole antenna in the E planes cut along the axial direction of the dongle can be attained. The monopole selected for studies has a symmetrical, short-circuited structure and is to operate in the 2.4 GHz (2400-2484 MHz) band for ZigBee or Wi-Fi dongle applications...
A printed loop antenna for integration into a compact, outdoor WLAN access point (AP) is presented. The loop design has a one-wavelength, resonant structure with respect to the centre operating frequency of the 2.4 GHz band and is formed on a 1.6-mm thick FR4 substrate. The antenna substrate is further stacked above a system PCB of an outdoor AP by a small distance. In this study, the proposed design...
A patch antenna fed by an inclined probe pin with a step-shaped ground plane has been proposed. The impedance matching for frequencies across the2.4 GHz band is all within VSWR of 1.5 (better than 14dB), which covers WLAN operation. The measured results show that although a shore probe pin and the shape of a fillister ground is in use, large probe inductance is well compensated for additional capacitive...
Multiple-input multiple-output (MIMO) technology using multiple transmit/ receive antennas is considered one of the most promising approaches to higher throughput wireless systems. A lot of "lln" products are readily accessible in the marketplace although the IEEE has very recently ratified the IEEE 802.1 In standard in September 2009 [1]. To integrate more antennas into the wireless access...
A high-gain, three-antenna system suitable to be concealed inside wireless access points for multiple-input multiple-output (MIMO) applications in the WLAN 2.4/5.2/5.8 GHz bands is presented. The MIMO antenna system is composed of three dual-loop antennas occupying a moderate size of 10 × 20 × 40 mm3. Each dual-loop antenna further comprises a large outer loop and a small inner loop, both operating...
Circularly polarized (CP) antennas are attractive to wireless communications applications simply because less strict orientations are required for mobile stations (the end user) with respect to base stations. To achieve CP operation, many designs of patch antennas have been reported in the literature. However, for the designs utilizing dielectric substrates, single-feed, single-element patch antennas...
A novel hybrid of a 2.4-GHz monopole antenna and a 5-GHz dipole antenna is presented to provide concurrent 2.4 and 5 GHz band operation for access-point applications. The two antennas are arranged in a collinear structure and printed on a compact dielectric substrate with dimensions 12 mm times 60 mm. The monopole antenna has a meandered radiating strip and is short-circuited to a small ground plane...
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