This letter proposes a new bandpass shielding enclosure (BPSE) for modern handheld communication devices. This enclosure is characterized by high transmittance at the specified wireless signal band and high shielding effectiveness (SE) outside this band. In addition, it has little influence on the impedance-matching bandwidth and antenna patterns of an internal antenna embedded inside the device. A prototype was created, simulated and measured. The simulated and measured results demonstrate the promising performance of this newly proposed shielding enclosure.

In this letter, we present a new triple-band planar antenna, a non-uniform meandered and fork-type grounded antenna (NMFGA), for mobile communication systems. The antenna is designed for triple-band operations at 900 MHz, 1800 MHz, and 2450 MHz bands. A prototype of the NMFGA was constructed and studied. Measured and simulated return loss and measured radiation patterns were obtained. The experimental results demonstrate the attractive bandwidth and radiation performance of the newly developed antenna for all the three bands.