Loop antenna, loop antenna system and wireless communication...

Details Loop antenna, loop antenna system and wireless communication... Loop antenna, loop antenna system and wireless communication...

2005-01-18

2005-01-18

Vannucci, James (Department: 2828)

Communications: radio wave antennas

Antennas

High frequency type loops

C340S572800, C343S742000

Reexamination Certificate

active

06844859

ABSTRACT:
A loop antenna is constructed by bending a linear conductor so that it forms concavo-convex portions within an antenna plane. As an example, the shape of the loop antenna comprises a long straight line portion (LP) which elongates substantially straight in the direction of the arrow X, a short straight line portion (TP1) which is at a predetermined angle (θ1) with respect to the long straight line portion (LP) and shorter than the long straight line portion (LP), and a short straight line portion (TP2) which is at a predetermined angle (θ3) with respect to the short straight line portion (TP1) and at a predetermined angle (θ2) with respect to the long straight line portion (LP) and has approximately same length as the short straight line portion (TP1), wherein an acute angle portion (TG1) which is formed by the short straight line portions (TP1) and (TP2), and acute angle portions (TG2,TG3and TG4) each having approximately same shape as the acute angle portion (TG1) are succeeding in the opposite direction of the arrow X to the vicinity of a feeding point (P2).

REFERENCES:
patent: 5270717 (1993-12-01), Schuermann
patent: 5914692 (1999-06-01), Bowers et al.
patent: 6204819 (2001-03-01), Hayes et al.

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