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3910 results about "Dielectric substrate" patented technology

The dielectric material is used as PCB for fabricating the RF circuit layout as per design of various RF/microwave systems. The dielectric substrate selection plays very vital role in size reduction and impedance matching.

L-waveband broadband circular polarization micro-strip antenna

The invention discloses an L-waveband broadband circular polarization micro-strip antenna which comprises an upper-layer radiating antenna dielectric substrate and a lower-layer feed network dielectric substrate; a radiation patch is printed on the upper surface of the upper-layer radiating antenna dielectric substrate; four coupling patches are printed on the lower surface of the upper-layer radiating antenna dielectric substrate; an earth plate is arranged on the upper surface of the lower-layer feed network dielectric substrate, and a micro-strip power dividing phase-shifting feed network with one input end and four output ends is printed on the lower surface of the lower-layer feed network dielectric substrate; an air gap is formed between the upper-layer radiating antenna dielectric substrate and the lower-layer feed network dielectric substrate; each coupling patch is connected with one output end of the micro-strip power dividing phase-shifting feed network through a metal probe. The L-waveband broadband circular polarization micro-strip antenna is simple in structure, low in cost, easy to tune, wide in impedance bandwidth and circular polarization bandwidth and suitable for application to a maritime satellite communication system and a satellite positioning navigation system terminal.
Owner:DALIAN MARITIME UNIVERSITY

Self-compensating antennas for substrates having differing dielectric constant values

An RFID tag or label in combination with a dielectric material comprises a dielectric material and a wireless communication system that is mounted in electrical proximity to the dielectric material. The wireless communication system comprises a wireless communication device associated with an antenna system that has at least one conductive tab, including one or both of the following: (a) a plurality of electrical components that are selected to form an impedance matching network, that are coupled to the conducting tab and wireless communication device. The electrical components electrically interact with the dielectric material to maintain a substantial impedance match between the antenna system and the wireless communication device; and, (b) a structural element forming a frequency selective by-pass trap circuit formed in the conducting tab and electrically interacting with the dielectric material to maintain a substantial impedance match between the antenna system and the wireless communication device. The antenna system may be directly mounted on a dielectric substrate, which serves as the dielectric material Alternatively, the antenna system may be mounted on a backing layer intermediate the dielectric substrate and the antenna system, the backing layer in turn being attached to the dielectric substrate, wherein the backing layer and the dielectric substrate collectively serve as the dielectric material.
Owner:AVERY DENNISON CORP
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