CHIP ANTENNA AND COMMUNICATION CIRCUIT SUBSTRATE FOR TRANSMISSION AND RECEPTION

• US 20150116179A1
• Filed: 09/15/2014
• Published: 04/30/2015
• Est. Priority Date: 10/30/2013
• Status: Active Grant

• Current Assignee: Taiyo Yuden Company Limited (Taiyo Yuden Co)
• Original Assignee: Taiyo Yuden Company Limited (Taiyo Yuden Co)
• Inventors: Mikata, Jin
• Granted Patent: US 9,698,481 B2
• Time in Patent Office: Days
• US Class Current: 343/845
• CPC Class Codes: H01Q 1/2291 used in bluetooth or WI-FI devices of Wireless Local Area Networks [WLAN] H01Q1/241 takes precedence; WLAN in general H04W
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/371 Branching current paths
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

A first radiating electrode of a split ring resonator type is formed on a side face of a substrate of a rectangular cuboid antenna device so as to be at a right angle to a ground electrode surface, a second radiating electrode is provided on a top surface of the substrate, the first radiating electrode and the second radiating electrode are capacitively coupled, and the resonance frequency of the first radiating electrode and second radiating electrode are configured to be approximately in symmetry with the central frequency of the used frequency.

Claims

1. A chip antenna, comprising:

a block having a rectangular cuboid shape;

a feed terminal pad formed on a bottom surface of the block at a side of said bottom surface;

a ground electrode formed on an area on the bottom surface of the block;

an electrically insulated area formed on the bottom surface of the block so as to separate the feed terminal pad with the ground electrode;

an excitation electrode that has one end on a side face of the block, the end being connected to the feed terminal pad on the bottom surface, the excitation electrode extending from a bottom portion of said side face of the block towards a top surface of the block;

a first radiating electrode of a split ring resonator type having two open ends, the first radiating electrode having a capacitively coupled portion formed by arranging two open end portions defining a slit on said another side face of the block, the first radiating electrode having a prescribed portion connected to another end of the excitation electrode;

a second radiating electrode having two ends, one end being connected to the ground electrode and another end being open, and in which at least a central portion of the second radiating electrode is formed on the top surface of the block and an open end portion of the second radiating electrode forms a slit with a portion of the first radiating electrode, the open end portion forming a capacitively coupled portion between the first radiating electrode and said open end portion,

wherein a resonance frequency of the first radiating electrode and a resonance frequency of the second radiating electrode are configured to be different from each other.

2. The chip antenna according to claim 1,

wherein the first radiating electrode is arranged so that the two open end portions are parallel to each other with the slit therebetween, and the capacitively coupled portion is formed between said two open end portions.

3. The chip antenna according to claim 1,

wherein the second radiating electrode has a U-shaped turn portion and is connected to the ground electrode through the open end of the second radiating electrode and the U-shaped turn portion.

4. The chip antenna according to claim 1,

wherein the portion of the first radiating electrode forming the capacitively coupled portion with the second radiating electrode and the open end of the second radiating electrode are formed on the top surface of the block so that the capacitively coupled portion is formed between the first radiating electrode and the second radiating electrode on the top surface of said block.

5. The chip antenna according to claim 1,

wherein the first radiating electrode and the open end portion of the second radiating electrode are formed on said another side face of the block so that the capacitively coupled portion between the first radiating electrode and the second radiating electrode is formed on said another side face of the block.

6. A communication circuit substrate for transmission and reception, comprising a ground electrode on a surface of the communication circuit substrate for transmission and reception,

wherein the chip antenna according to claim 1 is mounted on the communication circuit substrate for transmission and reception so that the ground electrode of the chip antenna and the ground electrode of said substrate are electrically connected.