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Characteristics of antennas and propagation channels in on-body communications have been ascertained. Earlier studies indicated that not only maximization of path loss between body-mounted devises by use of monopole-like antennas but also countermeasures against fading by use of multi polarization antennas may be an important issue. Multi polarization can be obtained by perturbing the patch antennas...
We developed a PIFA made of flexible printed circuit, which is available for Bluetooth and IEEE802.11a/b/g applications. We measured the characteristics of the antenna when it is folded along the coaxial cable. It is shown that the characteristics do not vary much when the angle of folding is less than 90deg. The performance is confirmed by a simulation based on the FDTD method. The antenna is expected...
A printed monopole antenna for quad-band operation in the mobile phone has been proposed and studied. The antenna occupies a volume of 24.3 x 20 x 4 mm3 with a very low height as compared to others, yet it can cover two wide bands centred at about 925 MHz and 1920 MHz to realize GSM/DCS/PCS/UMTS operation. Good radiation characteristics of the antenna over the operating bands have also been observed...
An antenna which is combined the lineally polarized hexagonal shaped feed patch and the square shaped parasitic patch is proposed for wideband circular polarization antenna. The mechanism of wideband characteristics is clarified.
In this paper, the low profile stacked patch antenna with slot apertures is proposed. The bandwidth enhancement capability of the proposed antenna is demonstrated by using both the equivalent network analysis and method of moments. As a result, it is found that the proposed antenna structure is effective to enhance the bandwidth of the patch antenna.
In this paper, a miniaturized circularly polarized patch antenna with a stacked configuration for gain enhancement is presented. This patch antenna consists of a circular sector element with square notches. Normal circular sector patch antenna generates two different resonant modes. Theoretically, one mode induces a polarization that is perpendicular to the polarization of the second mode. In this...
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