55results about How to "Realize Broadband" patented technology

An inverted F antenna and a radio device comprising the same. The antenna element comprises a grounding conductor plate and a conductor spaced from the grounding conductor plate, disposed above the grounding conductor plate, and made of a conductor at least part of which is generally spiral. A stab connects one end of the antenna element and the grounding conductor plate. A feeder connects a feeding point on the antenna element at a predetermined distance from the one end to an external circuit. The antenna element is secured to the grounding conductor plate through a holding member of a dielectric material.

A planar radiation element (2) is arranged on the ground surface (5) while spaced apart therefrom. The radiation element (2) resonates at predetermined low level wavelength lambda1 and high level wavelength lambda2. On the periphery of the radiation element (2), a feeding portion (3) to be connected with a feeding circuit and a pair of short circuit portions (7, 8) are provided. The feeding portion (3) is provided on one end side of the radiation element (2). The pair of short circuit portions (7, 8) are provided in the regions that are on the opposite sides along the circumferential edge direction of the radiation element (2) from the feeding portion (3) and give portions where the voltages of high level resonance respectively delivered from the feeding portion (3) to the short circuit portions (7, 8) become zero. The short circuit portions (7, 8) are extended to the ground surface (5) side and connected therewith. The radiation element (2) has an open end (6) on the other side, i.e.the side opposite to the feeding portion (3). Electric length of the radiation element (2) from one end side to the other end side (6) thereof is formed to be one half of the high level resonance wavelength lambda2 of the radiation element (2).

A surface mount antenna and an antenna module with small size and broadband are provided. In the surface mount antenna, the part ( a substrate upper part(41A) and a substrate side part(41B)(41C)) between a power supply radiating conductor(11) and a non-power-supply radiating conductor(12) is in the groove shape. The part in the groove shape is an air layer, thus being as the lower-dielectric-constant area. The area with the dielectric constant lower than that of the dielectric substrate 10 is arranged among the power supply radiating conductors, thus reducing the electromagnetic coupling amount among the radiating conductors, further making the resonant frequencies of all radiating conductors similar in the multiple resonance forming range to realize the broadband.

The invention discloses a broad band low profile conic sleeve monopole antenna which comprises a monopole (1), a conic top loading sleeve (2), a top loading disc (3), a floor (6), first short circuit probes (4), a second short circuit probe (5) and a radio frequency interface unit (8). The monopole (1) is placed perpendicularly to the floor (6). The top loading disc (3) is placed at the top of the monopole (1). The top loading disc (3) and the monopole (1) are connected through screws. The top loading disc (3) is used for top loading to the monopole (1). The top loading disc (3) and the floor (6) form a short circuit through four first short circuit probes (4). A conic sleeve is added to the monopole so that circular ring top loading is performed to the sleeve, and therefore impedance bandwidth of the antenna is broadened effectively and the dimension of the antenna is reduced.

Provided is an RFID tag by which the communication distance is not shortened even when wireless communication is performed with a metal object and broadband and high gain are achieved. An RFID tag set and an RFID system are also provided. In an RFID tag (1), an antenna section (4) is arranged on a first dielectric substrate (3), a grounding conductive plate (2) is arranged between the first dielectric substrate (3) and a second dielectric substrate (5), and the electrical length of the antenna section and that of the grounding conductive plate are set different from each other.