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A sensitive coefficient was put forward to study the effect of random errors on the directivity of six amplitude-weighted line arrays. Studies show that: random errors cause the loss of directivity, and amplitude weights influence that kind of loss slightly. In addition, that kind of loss has a linearity relationship with the distance between neighboring units; and the larger the line array is, the...
A novel, ultra-wideband antenna element has been developed for broadband antenna array applications. It has novel asymmetric tapered slot structure and is fed by microstrip line. The antenna element can operate over an ultra-wideband from 1.5 GHz-9.5 GHz. A broadband antenna array composed by the novel antenna elements is also proposed. The asymmetric tapered slot antenna and its mirror image are...
In this paper the theory and experiment have demonstrated a good performance of this new antenna array. The operating bandwidth of this antenna array is from 3.1 GHz to 12.4 GHz, which covers all the frequency range of UWB, and the radiation pattern is bidirectional.
We have developed a 1 times 4 wideband array structure for multiple wireless applications. The utilized single element is a wide-slot antenna and has demonstrated ultra-wideband operation characteristics. The proposed antenna system associated with feeding network and antenna elements can be integrated in a single substrate. Consequently, such a design is with low fabrication and assembly cost and...
A novel band-notched ultra-wideband wide-slot antenna fed with a microstrip-line is presented. The antenna is composed of a circular microstrip patch and a semicircular arc cut on the ground of the microstrip line. By embedding a simple arc-shaped slot in the circular microstrip patch, an ultra- wideband (UWB, 3.1-10.6 GHz) operation with a notched frequency band can be obtained. The arc-shaped slot...
Several practical techniques have been employed to modify the operating frequency, enhance the bandwidth and miniaturize the antenna size for a small coplanar waveguide (CPW)-fed slot antenna at 2.4 and 5.2 GHz, the industrial-scientific-medical (ISM) bands. These techniques include: utilizing an E-like feeding structure instead of the conventional T-shaped one; adding a matching stub at the slot...
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