Loaded antenna

A novel loaded antenna is defined in the present invention. The radiating element of the loaded antenna consists of two different parts: a conducting surface and a loading structure. By means of this configuration, the antenna provides a small and multiband performance, and hence it features a similar behaviour through different frequency bands.

ELECTRIC ELEMENTS

Details of, or arrangements associated with, antennas -Structural form of radiating elements, e.g. cone, spiral, umbrella; ; Particular materials used therewith

ANTENNAS, i.e. RADIO AERIALS 

Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements-Resonant antennas-with feed to end of elongated active element, e.g. unipole -with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements-Resonant antennas-Substantially flat resonant element parallel to ground plane, e.g. patch antenna -with particular tuning means

Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements-Resonant antennas-Substantially flat resonant element parallel to ground plane, e.g. patch antenna 

Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements-Resonant antennas-with feed to end of elongated active element, e.g. unipole -Element having extended radiating surface

Details of, or arrangements associated with, antennas -Supports; Mounting means-by structural association with other equipment or articles-with receiving set-used in mobile communications, e.g. GSM -specially adapted for hand-held use-with built-in antennas

Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices -Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices -having a fractal shape

Details of, or arrangements associated with, antennas -Structural form of radiating elements, e.g. cone, spiral, umbrella; ; Particular materials used therewith-formed by a conductive layer on an insulating support 

Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements -Arrangements for providing operation on different wavebands-Individual or coupled radiating elements, each element being fed in an unspecified way-for different propagation modes -using a single feed point-Creating multiple current paths-Branching current paths

Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements-Resonant antennas-with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole -Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines -Planar dipole 

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