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A printed chip type antenna using monopole spiral slot structures with system ground for digital video broadcasting-handheld (DVB-H) signal reception in the UHF band is proposed. By utilizing the eight quarter-wavelength spiral slot I a radiator in configuration. In this case, the occupied area of the monopole slot chip antenna on the system circuit board can be further reduced . Antenna has a compact size of 20x20xO.8mm 3 • It size is minimized so that it can be easily installed to mobile handset. The simulated and measured results show that the impedance bandwidth covers the DVT (470-860 MHz) band with return loss ISIlI than 5. The antenna can get omnidirectional radiation pattern in the whole frequency band. The measurement result is agree with simulation.Index Termsdigital video broadcasting-handheld (DVB-H), spiral slot, monopole slot, mobile handset, omnidirectional.

A compact printed spiral-slot multimode antenna operated at its quarter wavelength (k/4) mode as the fundamental resonant mode for digital television (DTV) signal receptions is presented. To achieve broadband characteristics, the proposed antenna is constructed by embedding the eight different quarter-wavelength spiral slots on system ground plane and is fed using a 50-X microstrip. The eight spiral slots also generate eight k/4 resonance modes to cover the DTV reception band (470-862 MHz) throughout the world. Further, the proposed antenna has a simple planar eight-spiral-slot structure and occupies a small area of 20 Â 20 mm 2 only on the system ground plane (20 Â 70 mm 2 ). The impedance matching and bandwidth of the proposed antenna are significantly affected by the sheet metal on the signal line. The antenna is able to realize an omnidirectional radiation pattern over the entire frequency band. Further, the measurement results agree with the simulation ones.

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