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A novel miniature antenna design for ultra-wideband (UWB) applications is presented. The proposed compact antenna is achieved by exploiting a quasi-self-complementary structure along with a tapered radiating slot. The optimal design of this type of antenna can offer an ultra-wide 10 dB impedance bandwidth with reasonable radiation properties. It also exhibits very small dimensions, 19 ?? 16 mm in...
Small antennas have been widely investigated and reported in various medical applications for some times. It is interesting to note that small ultra wideband (UWB) antennas are also demanded for some medical applications recently. One of the medical applications which require the UWB antennas is the microwave imaging of breast cancer. This imaging modality transmits lower power short microwave pulses...
A novel and simple design of a quasi-self-complementary antenna for ultra wideband applications is presented. The proposed antenna, which is fed by a 50 Omega coplanar waveguide without using a matching circuit, can offer an ultra-wide 10 dB impedance bandwidth. It also features a compact and small size, only 0.22 lambda at 1.3 GHz, which is the lower end of the bandwidth. Good agreement is achieved...
The characteristics of antipodal Vivaldi antennas with different structures and the key factors that affect the performance of the antipodal antennas have been investigated. The return loss, radiation pattern and current distribution with various elliptical loading sizes, opening rates and ground plane sizes have been analyzed and compared using full wave simulation tool. Based on the parameter study,...
A brief overview on the recent development of small UWB antennas is presented. Several compact and small UWB antennas are exemplified to illustrate their respective performance. The working mechanism of UWB monopoles is revealed and it is understood that an adequate UWB antenna should feature a good performance in both the frequency and time domain. In addition, a size reduction on UWB disc antennas...
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