Reconfigurable sub-harmonic mixing antenna for low-cost wireless transceiver applications

Low‐cost active transceiver for WLAN applications

“…To satisfy the integration of WiFi, WiBro, and WiMAX for WMAN environment, multiband yet compact antennas are the preferred front-end for such mobile handsets/terminals. Recently, a novel type of dual-band two-strip planar antennas has been reported [1,2]. The two-strip antennas consist of an Sstrip and a T-strip, and have no shorting via in the antenna structures.…”

“…Owing to the strong EM coupling between strips, these two-strip antennas have the advantages of not just light-weight and compact but also have the monopole-like radiation patterns with wide dual-band operations. However, these antennas [1,2] are mainly designed for the WiFi or Wireless LAN applications, namely 2.4 and 5 GHz bands. Further, these antennas have adopted a very thin substrate, 10 mil RT/Duroid 5880, which is a soft texture, may not be suited for use as a PCB for the integration of microwave devices.…”

“…These may cause the unexpected errors in measurement phase. Therefore, as the first step, we followed the original designs from [1,2]; RT/ Duriod 5880 (e r ¼ 2.2) with a higher thickness of 0.78 mm ($31 mil) is chosen as the antenna substrate in our design. All the gaps, strip lengths, and widths in top and bottom layers have been optimized in order to meet the design objectives.…”

“…Techniques capable of handling interference and maintaining strong secure communication links have received much attention. Of the several possible approaches, mixing or multiplying active antennas show promise in such applications [1,2]. This is mainly due to the ease with which the radiating properties of printed antennas can be combined with the signal processing capabilities of active devices.…”