# US 2014/0191907 A1 · Printed circuit board including electromagnetic bandgap structure

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- Number: US 2014/0191907 A1
- Document ID: US20140191907A1
- Status: Published application
- Kind: A1
- Application number: 14/204,631
- Filed: 2014-03-11
- Published: 2014-07-10
- Earliest claimed: 2009-06-24
- Assignees: Samsung Electro-Mechanics Co., Ltd.
- Applicants: Samsung Electro-Mechanics Co., Ltd.
- Inventors: Won Woo CHO; Dek Gin YANG; Myung Gun CHONG; Jung Soo KIM; Hyung Ho KIM
- Web page: https://patentgrep.com/patent/US20140191907A1

## CPC

- 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)}
- H01Q 1/2283: {mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package}
- H01Q 15/008: {said selective devices having Sievenpipers' mushroom elements}
- H10W 44/248: {for antennas}
- H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

Embodiments of the present invention provide a printed circuit board, which includes an electromagnetic bandgap structure disposed around an antenna, so as to prevent noise from being transmitted to the antenna. The printed circuit board includes an antenna, a circuit chip, a plurality of metal layers and a plurality of dielectric layers, a pair of transmission lines for transmitting a signal to the antenna, and an electromagnetic bandgap structure disposed between the antenna and the circuit chip and for preventing an electromagnetic wave from being transmitted from the circuit chip to the antenna.

## Claims

### Claim 1

A printed circuit board, comprising:
an antenna;
a circuit chip;
a plurality of metal layers and a plurality of dielectric layers;
a pair of transmission lines configured to transmit a signal to the antenna; and
an electromagnetic bandgap structure disposed between the antenna and the circuit chip in the printed circuit board and configured to prevent an electromagnetic wave from being transmitted from the circuit chip to the antenna,
wherein the electromagnetic bandgap structure comprises a dielectric layer; a plurality of conductive plates; and a stitching via configured to electrically connect the conductive plates to each other, and
wherein the stitching via passes through the dielectric layer, and a part of the stitching via is placed in a planar surface that is different from a planar surface in which the conductive plates are placed.

### Claim 2 (depends on 1)

The printed circuit board as set forth in claim 1, wherein the stitching via comprises:
a first via passing through the dielectric layer and having an end part being connected to any one of two adjacent conductive plates, and a second via passing through the dielectric layer and having an end part being connected to the other of two adjacent conductive plates; and
a connection pattern having one end part being connected to the other end part of the first via and the other end part being connected to the other end part of the second via.

### Claim 2 (depends on 2)

The printed circuit board as set forth in claim 2, further comprising:
a conductive layer, wherein the dielectric layer is placed between the conductive plates and the conductive layer.

### Claim 4 (depends on 3)

The printed circuit board as set forth in claim 3, wherein the conductive layer comprises a-clearance hole, and the connection pattern is accommodated in the clearance hole.

### Claim 5 (depends on 1)

The printed circuit board as set forth in claim 1, wherein the conductive plates have a polygonal, circular or elliptical shape.

### Claim 6 (depends on 1)

The printed circuit board as set forth in claim 1, wherein the conductive plates have the same size

### Claim 7 (depends on 1)

The printed circuit board as set forth in claim 1, wherein the conductive plates are distinguished into a plurality of groups having different conductive plate sizes.

### Claim 8 (depends on 1)

The printed circuit board as set forth in claim 1, wherein the conductive plates are placed on the same planar surface.