Antenna
First Claim
1. An antenna used in a frequency range defined from 700 MHz to 3 GHz wherein:
- said antenna is formed on a printed circuit board as an electric conducting pattern having a length of ¼
(λ
/4)±
20% of a wavelength, where said printed circuit board mounts thereon a transmission circuit used in said frequency range; and
a portion of said antenna, which is longer than, or equal to ⅔
of an entire length of said antenna, owns a width wider than, or equal to λ
/400.
1 Assignment
0 Petitions
Accused Products
Abstract
A transmission antenna is formed on a transmission-sided board as an electric conducting pattern having a length of ¼(λ/4)±20% of a wavelength, where the transmission-sided board mounts thereon a transmission circuit used in a frequency range defined from 700 [MHz] to 3 [GHz], and a portion of the transmission antenna, which is longer than, or equal to ⅔ of an entire length of the transmission antenna, owns a width wider than, or equal to λ/400. And, an reception antenna is formed on a reception-sided board 202 as an electric conducting pattern having a length of ¼(λ/4)±20% of a wavelength, where the reception-sided board mounts thereon a reception circuit used in a frequency range defined from 700 [MHz] to 3 [GHz], and a portion of the reception antenna, which is longer than, or equal to ⅔ of an entire length of the reception antenna, owns a width wider than, or equal to λ/400.
6 Citations
6 Claims
-
1. An antenna used in a frequency range defined from 700 MHz to 3 GHz wherein:
-
said antenna is formed on a printed circuit board as an electric conducting pattern having a length of ¼
(λ
/4)±
20% of a wavelength, where said printed circuit board mounts thereon a transmission circuit used in said frequency range; and
a portion of said antenna, which is longer than, or equal to ⅔
of an entire length of said antenna, owns a width wider than, or equal to λ
/400.- View Dependent Claims (2, 3)
said portion of the antenna longer than, or equal to ⅔
of the entire length thereof is separated from either a ground portion or said transmission circuit, which are formed on said printed circuit board, by λ
/400 or longer.
-
-
3. An antenna as claimed in claim 2 wherein:
transmission output terminal portions are provided on said antenna and said ground portion, where said transmission output terminal portions are capable of measuring a transmission output from said transmission circuit; and
said antenna is further comprised of a switching portion for switching as to whether or not said antenna is electrically conducted to said transmission circuit.
-
4. An antenna used in a frequency range defined from 700 MHz to 3 GHz wherein:
-
said antenna is formed on a printed circuit board as an electric conducting pattern having a length of ¼
(λ
/4)±
20% of a wavelength, where said printed circuit board mounts thereon a reception circuit used in said frequency range; and
a portion of said antenna, which is longer than, or equal to ⅔
of an entire length of said antenna, owns a width wider than, or equal to λ
/400.- View Dependent Claims (5, 6)
said portion of the antenna longer than, or equal to ⅔
of the entire length thereof is separated from either a ground portion or said reception circuit, which are formed on said printed circuit board, longer than, or equal to λ
/800.
-
-
6. An antenna as claimed in claim 5 wherein:
reception input terminal portions are provided on said antenna and said ground portion, where said reception input terminal portions are capable of inputting a reception signal into said reception circuit; and
said antenna is further comprised of a switching portion for switching as to whether or not said antenna is electrically conducted to said reception circuit.
Specification