Communications: radio wave antennas – Antennas – With radio cabinet
Patent
1992-09-14
1994-11-15
Hajec, Donald
Communications: radio wave antennas
Antennas
With radio cabinet
343745, 343900, H01Q 124
Patent
active
053652479
ABSTRACT:
The invention concerns a combination of a transmitter/receiver (12, 13) having a predetermined frequency/wavelength and an antenna (15), the antenna comprising a coiled wire portion (16) one end of which is connected to the output (14) of the transmitter/receiver and a straight wire portion (17) one end of which is connected in series to the other end of the coiled wire portion, the combined length of the portions being no more than one quarter wavelength, the inductive reactance of the coiled wire portion (16) being selected to both substantially tune out the capacitive reactance of the transmitter (12, 13) and the capacitive reactance of the straight wire portion so that the overall impedance of the system is predominantly resistive, and at least the majority of the coiled portion (16) being external to the conductive portion (12) of the transmitter so as to effectively add to the electrical length of at least the straight portion (17) and itself act as a radiator. The system is particularly designed to be used with no ground plane or only a partial ground plane and with the antenna length less than quarter wavelength. This is particularly useful in the sport of falconry. The system of the invention gives a higher output than a conventional quarter wavelength straight antenna with no ground plane.
REFERENCES:
patent: 3176229 (1965-03-01), Pierce
patent: 3513472 (1970-05-01), Altmayer
patent: 3978410 (1976-08-01), Fletcher et al.
patent: 4491843 (1985-01-01), Boubouleix
patent: 4543581 (1985-09-01), Nemet
patent: 4564843 (1986-01-01), Cooper
patent: 4612667 (1986-09-01), Hansen
Smith Graham K. L.
Van der Veen Albertus C.
Hajec Donald
Hi-Trak Systems Limited
Le Hoang-anh
LandOfFree
Transmitters and receivers with antennas does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Transmitters and receivers with antennas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Transmitters and receivers with antennas will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1100771