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Design of a multiband internal antenna for mobile handset applications is presented. Two antenna elements are formed on top and bottom of the common substrate and connected by metallic pin. Resonant frequency of each element is almost independent. Matching the impedance with the slit, a wide bandwidth is achieved so that the operating frequency bands include GSM (880-960 MHz), GPS (1575 MHz), DCS...
In this paper, a new marchand balun with coupled line structure is suggested and realized by LIGA-like micromachining process. The balun has uniplanar structure (coplanar waveguide structure, CPW) and the simulation results show a very wide bandwidth of 18 GHz (6 GHz ~ 24 GHz), low power split of less than 1 dB, and low phase split of 10 degree between output ports. This CPW LIGA-like balun can be...
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