Antenna using proximity-coupled feed method, RFID tag having the same, and antenna impedance matching method thereof
First Claim
Patent Images
1. An antenna, comprising:
- a radiation patch for deciding a resonant frequency of the antenna;
a ground plate disposed in parallel to the radiation patch; and
a feeder disposed between the radiation patch and the ground plate in parallel for providing a RF signal to an element connected to the antenna, wherein the feeder includes a microstrip feed line proximately coupled to the radiation patch by being formed perpendicularly to the resonant length direction of the radiation patch.
1 Assignment
0 Petitions
Accused Products
Abstract
An antenna, a RFID tag using the same, and an antenna impedance matching method thereof are provided. The antenna includes: a radiation patch for deciding a resonant frequency of the antenna; a ground plate disposed in parallel to the radiation patch; and a feeder disposed between the radiation patch and the ground plate in parallel for providing a RF signal to an element connected to the antenna, wherein the feeder includes a microstrip feed line proximately coupled to the radiation patch by being formed perpendicularly to the resonant length direction of the radiation patch.
-
Citations
57 Claims
-
1. An antenna, comprising:
-
a radiation patch for deciding a resonant frequency of the antenna;
a ground plate disposed in parallel to the radiation patch; and
a feeder disposed between the radiation patch and the ground plate in parallel for providing a RF signal to an element connected to the antenna, wherein the feeder includes a microstrip feed line proximately coupled to the radiation patch by being formed perpendicularly to the resonant length direction of the radiation patch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. An antenna, comprising:
-
a radiation patch for deciding a resonant frequency of the antenna;
a ground plate disposed in parallel to the radiation patch; and
a feeder disposed between the radiation patch and the ground plate in parallel for providing a RF signal to an element connected to the antenna, wherein the feeder includes a microstrip feed line proximately coupled to the grand plate by being formed perpendicularly to the resonant length direction of the radiation patch. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
-
41. A radio frequency identification (RFID) tag, comprising:
-
an antenna for receiving a radio frequency (RF) signal transmitted from a RFID reader;
a front-end for rectifying and detecting the RF signal; and
a signal processor connected to the RF front-end, wherein the antenna includes;
a radiation patch for deciding a resonant frequency of the antenna;
a ground plate disposed in parallel to the radiation patch; and
a feeder disposed between the radiation patch and the ground plate for providing a RF signal to the RF front-end through a microstrip feed line proximately coupled to the radiation patch by being formed perpendicularly to the resonant length direction of the radiation patch. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49)
-
-
50. An impedance matching method for an antenna having a radiation patch for deciding a resonant frequency of the antenna, a ground plate disposed in parallel to the radiation patch, and a microstrip feed line proximately coupled to the radiation patch by being disposed between the radiation patch and the ground plate to be perpendicular to the resonant length direction of the radiation patch, the method comprising the step of:
matching impedance using a characteristic that a real number part of an antenna impendence varies according to a location of the feed line in the resonant length direction of the radiation patch. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57)
Specification