Antenna and wireless communication device
First Claim
1. An antenna comprising:
- a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends;
feeding portions arranged inside the first loop electrode;
a second loop electrode connected to the feeding portions;
a coupling electrode that couples the first loop electrode and the second loop electrode to each other; and
a plate electrode that includes an opening and a slit portion that communicates with the opening;
whereinthe coupling electrode and a portion of the first loop electrode are located in a peripheral portion of the plate electrode;
the second loop electrode is located in a peripheral portion surrounding the opening; and
opposing portions of the slit portion define the feeding portions.
1 Assignment
0 Petitions
Accused Products
Abstract
An antenna and a wireless communication device which are suitable for an RFID system and in which radiation characteristics are prevented from being changed as a result of impedance adjustment are configured such that the antenna includes a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends, feeding portions arranged inside the first loop electrode, a second loop electrode connected to the feeding portions, and a coupling electrode that couples the first loop electrode and the second loop electrode to each other. The wireless communication device is obtained by coupling the wireless communication element which processes a high-frequency signal to the feeding portions.
-
Citations
19 Claims
-
1. An antenna comprising:
-
a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends; feeding portions arranged inside the first loop electrode; a second loop electrode connected to the feeding portions; a coupling electrode that couples the first loop electrode and the second loop electrode to each other; and a plate electrode that includes an opening and a slit portion that communicates with the opening;
whereinthe coupling electrode and a portion of the first loop electrode are located in a peripheral portion of the plate electrode; the second loop electrode is located in a peripheral portion surrounding the opening; and opposing portions of the slit portion define the feeding portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. An antenna comprising:
-
a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends; feeding portions arranged inside the first loop electrode; a second loop electrode connected to the feeding portions; a coupling electrode that couples the first loop electrode and the second loop electrode to each other;
whereinthe first loop electrode defines a radiation portion and the second loop electrode defines an impedance matching portion.
-
-
16. A wireless communication device comprising:
-
a first loop electrode that has an external shape of a regular polygon or circle and that includes a pair of open ends; feeding portions arranged inside the first loop electrode; a second loop electrode connected to the feeding portions; a coupling electrode that couples the first loop electrode and the second loop electrode to each other; a plate electrode that includes an opening and a slit portion that communicates with the opening; and a wireless communication element coupled to the feeding portions;
whereinthe coupling electrode and a portion of the first loop electrode are located in a peripheral portion of the plate electrode; the second loop electrode is located in a peripheral portion surrounding the opening; and opposing portions of the slit portion define the feeding portions. - View Dependent Claims (17, 18, 19)
-
Specification