Variable helical antenna

Details Variable helical antenna Variable helical antenna

1998-06-26

2000-01-04

Wong, Don

Communications: radio wave antennas

Antennas

Spiral or helical type

343745, H01Q 136

Patent

active

060115254

ABSTRACT:
A variable helical antenna comprises coaxial conductive first and second helices extending in the same direction. The helices have first portions interleaved with each other without being in mechanical contact. A fixed protection member made in insulative material contains at least a portion of the first helix. A second member made in insulative material is screwed to the first member and contains at least a portion of the second helix. The second helix is attached to the second member. On screwing/unscrewing, the second helix is moved helically, by sliding on itself, relative to the first helix in order to tune the antenna to a required frequency indicated on a graduation on the fixed protection member.

REFERENCES:
patent: 4325069 (1982-04-01), Hills
patent: 5469177 (1995-11-01), Rush et al.
patent: 5489916 (1996-02-01), Waterman et al.
patent: 5581268 (1996-12-01), Hirshfield
patent: 5841407 (1998-11-01), Birnbaum

Affiliated with

Also associated with

Rating

Variable helical antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable helical antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable helical antenna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1076255