DUAL-BAND INVERTED-F ANTENNA WITH A BRANCH LINE SHORTING STRIP
First Claim
1. A dual-band inverted-F antenna comprising:
- a primary radiating member comprising a first metallic strip, a second metallic strip integrally formed with the first metallic strip, a feeding point on the second metallic strip, and a first shorting point on the second metallic strip wherein a first current path is created in the first metallic strip such that the antenna is adapted to operate in a first low frequency operating mode, and a second current path shorter than the first current path is created in the second metallic strip such that the antenna is adapted to operate in a second high frequency operating mode;
a secondary radiating member for increasing an operating frequency of the antenna when the antenna operates in the second high frequency operating mode, the secondary radiating member comprising a second shorting point;
a ground surface;
a dielectric substrate;
a branch line shorting strip having one end electrically connected to the ground surface, and a bifurcation distal its one end, the bifurcation including a first branch electrically connected to the first shorting point and a second branch electrically connected to the second shorting point; and
a feeding member formed of a metallic strip having one end electrically connected to the feeding point and the other end electrically connected to a system signal source for sending and receiving electromagnetic waves.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is dual-band inverted-F antenna for GSM, DCS, and PCS bands comprising a primary radiating member including integral first and second metallic strips, a feeding point, and a first shorting point wherein a long current path is created in the first strip such that the antenna can operate in a first low frequency operating mode, and a shorting current path is created in the second strip such that the antenna can operate in a second high frequency operating mode; a secondary radiating member comprising a second shorting point; a branch line shorting strip having one grounded end and a bifurcation including a first branch connected to the first shorting point and a second branch connected to the second shorting point; and a feeding member interconnected the feeding point and a signal source. Operating frequencies of the antenna are 90 MHz and 300 MHz respectively when it operates in 3.5:1 VSWR impedance bandwidth.
-
Citations
10 Claims
-
1. A dual-band inverted-F antenna comprising:
-
a primary radiating member comprising a first metallic strip, a second metallic strip integrally formed with the first metallic strip, a feeding point on the second metallic strip, and a first shorting point on the second metallic strip wherein a first current path is created in the first metallic strip such that the antenna is adapted to operate in a first low frequency operating mode, and a second current path shorter than the first current path is created in the second metallic strip such that the antenna is adapted to operate in a second high frequency operating mode;
a secondary radiating member for increasing an operating frequency of the antenna when the antenna operates in the second high frequency operating mode, the secondary radiating member comprising a second shorting point;
a ground surface;
a dielectric substrate;
a branch line shorting strip having one end electrically connected to the ground surface, and a bifurcation distal its one end, the bifurcation including a first branch electrically connected to the first shorting point and a second branch electrically connected to the second shorting point; and
a feeding member formed of a metallic strip having one end electrically connected to the feeding point and the other end electrically connected to a system signal source for sending and receiving electromagnetic waves. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification