Wireless portable device
First Claim
1. A wireless portable device comprising, on a single printed circuit board:
- a radio circuit block for processing signals received/transmitted from/to a base station;
a digital circuit block for processing digital signals in data processing; and
a current restriction structure disposed between said radio circuit block and said digital circuit block,wherein, said current restriction structure restricts a radio frequency current generated in said radio circuit block and transferred through a ground layer of said printed circuit board from entering said digital circuit block, and/or a higher-harmonic-wave current generated in said digital circuit block and transferred through said ground layer of said printed circuit board from entering said radio circuit block.
2 Assignments
0 Petitions
Accused Products
Abstract
A current restriction structure for restricting a higher-harmonic-wave current generated in a digital circuit block from entering a radio circuit block and/or a radio-frequency current generated in the radio circuit block from entering the digital circuit block is disposed between the radio circuit block and the digital circuit block. The current restriction structure is formed by one or two of equivalent rectangular cylindrical metallic tube including metallic planes overlying/underlying the ground layer and a narrow-pitch via-hole array, which are disposed to enclose the subject current to be restricted and have a short-circuited distal end. The distance between the open plane of the equivalent rectangular cylindrical metallic tube and the short-circuiting plate is set at ¼ of the wavelength of the subject current to be restricted.
-
Citations
16 Claims
-
1. A wireless portable device comprising, on a single printed circuit board:
-
a radio circuit block for processing signals received/transmitted from/to a base station; a digital circuit block for processing digital signals in data processing; and a current restriction structure disposed between said radio circuit block and said digital circuit block, wherein, said current restriction structure restricts a radio frequency current generated in said radio circuit block and transferred through a ground layer of said printed circuit board from entering said digital circuit block, and/or a higher-harmonic-wave current generated in said digital circuit block and transferred through said ground layer of said printed circuit board from entering said radio circuit block.
-
-
2. A wireless portable device comprising, on a single printed circuit board, a radio circuit block for processing signals received/transmitted from/to a base station;
-
a digital circuit block for processing digital signals in data processing; and a current restriction structure disposed between both said circuit blocks, wherein, said current restriction structure is implemented by at least one metallic tube for restricting a subject current to be restricted, which is either of a radio frequency current generated in said radio circuit block and a higher-harmonic-wave current generated in said digital circuit block, from transferring out of one of said circuit blocks to the other of said circuit blocks via a ground layer on said printed circuit board; and said metallic tube is implemented by metallic planes and a via-hole array which are configured to enclose said subject current and have a short-circuiting plate at a distal end thereof, and a distance between an open plane of said metallic tube opposing one of said both circuit blocks and said short-circuiting plate is set at ¼
of a wavelength of said subject current, to thereby obtain a higher impedance at said open plane to restrict said entering. - View Dependent Claims (3, 4)
-
-
5. A wireless portable device comprising, on a single printed circuit board, a radio circuit block for processing signals received/transmitted from/to a base station;
-
a digital circuit block for processing digital signals in data processing; and a current restriction structure disposed between both said circuit blocks for restricting a subject current to be restricted, wherein, said subject current is either a radio-frequency current generated in said radio circuit block or a higher-harmonic-wave current generated in said digital circuit block from entering one of said circuit blocks out of the other of said circuit blocks via a ground layer of said printed circuit board, wherein, said current restriction structure includes a first metallic plane overlying and parallel to said printed circuit board, a second metallic plane underlying and parallel to said printed circuit board, and equivalent metallic plane implemented by a via-hole array. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
-
Specification