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EP0618642A1
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Electromagnetic radiator using a leaky NRD waveguide
Assignee: T Yoneyama
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Filing: 1993-03-31
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Granted: —
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Expires: 2013-03-31
Abstract
Abstract Dielectric strips (12) made of a dielectric material are placed between a pair of conductor plates (1, 2) located a specified distance apart. Cutouts (14) are formed in the dielectric strips. By means of the cutouts, a part of each dielectric strip is formed into an electrically asymmetric portion. When high-frequency power is supplied to the dielectric strips, the power is transmitted through an NRD waveguide composed of the dielectric strips and the pair of conductor plates, with the result that electromagnetic wave is radiated from the cutouts (14) into the space between the conductor plates (1, 2). This electromagnetic wave excites the radiation elements (17) formed in the conductor plates (2), which then radiate electromagnetic waves.
Inventors
- 👤 Akira Takahashi
- 👤 Atsushi Kaise
- 👤 Tsukasa Yoneyama
- 👤 Yoshihiko Wagatsuma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 20:55
CPC Classifications
H; H01; H01Q; H01Q21/00; H01Q21/06; H01Q21/061; H01Q13/00; H01Q13/20; H01Q13/28; H01Q21/0006; H01Q21/0037; H01Q21/0068
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
147 words
An electromagnetic radiator using a leaky NRD waveguide for radiating and receiving electromagnetic waves, particularly high-frequency electromagnetic waves, characterized by comprising: a pair of conductor plates (1, 2, 1a, 2a, 41, 42, 51, 52, 62, 81, 82) placed a specified distance apart; a dielectric strip (12, 12b, 12d, 12e) made of a dielectric material, placed between the pair of conductor plates, which, together with the pair of conductor plates, forms an NRD waveguide; an electrically asymmetric portion (14, 14a, 14b, 14c, 14d, 14e, 14f, 14g) formed in a part of the NRD waveguide composed of the dielectric strip (12, 12b, 12d, 12e) and the pair of conductor plates (1, 2, 1a, 2a, 41, 42, 51, 52, 62, 81, 82) , which, together with the NRD waveguide, forms a leaky NRD waveguide; and power supply means (11, 21, 30) for supplying high-frequency power to the leaky NRD waveguide.
Claim 2
Dependent Claim
81 words
An electromagnetic radiator according to claim 1, characterized in that said conductor plates (1, 2, 1a, 2a, 41, 42, 51, 52, 62, 81, 82) extend on both sides or one side of said dielectric strip (12, 12b, 12d, 12e) and are provided with a radiation element (17, 31, 32, 47, 61, 88), which is excited by the electromagnetic wave radiated from the asymmetric portion of said dielectric strip into the space between said pair of conductor plates to radiate electromagnetic waves.
Claim 3
Dependent Claim
27 words
An electromagnetic radiator according to claim 2, characterized in that said radiation element is a radiation slot element (17, 31, 47, 61) formed in said conductor plates.
Claim 4
Dependent Claim
25 words
An electromagnetic radiator according to claim 2, characterized in that said radiation element is a patch antenna element (32) formed on a printed board (34).
Claim 5
Dependent Claim
29 words
An electromagnetic radiator according to claim 2, characterized in that said dielectric strips are placed in parallel with each other and supplied with high-frequency power of the same phase.
Claim 6
Dependent Claim
30 words
An electromagnetic radiator according to claim 2, characterized in that said dielectric strips are placed at right angles with each other and supplied with high-frequency power of a different phase.
Claim 7
Dependent Claim
15 words
An electromagnetic radiator according to claim 2, characterized in that said conductor plates are spherical.
Claim 8
Dependent Claim
65 words
An electromagnetic radiator according to claim 1, characterized in that the space formed between said pair of conductor plates (51, 52) is open to the outside at the ends of the conductor plates, and the electromagnetic wave radiated from the asymmetric portion of said dielectric strip into the space between the pair of conductor plates is radiated from the open portion (54) to the outside.
Claim 9
Dependent Claim
32 words
An electromagnetic radiator according to claim 1, characterized in that said asymmetric portion is a cutout (14, 14a, 14b, 14c, 14d, 14e, 14f, 14g) formed in a part of said dielectric strip.
Claim 10
Dependent Claim
31 words
An electromagnetic radiator according to claim 9, characterized in that a material (24) whose permittivity is higher than that of the material forming said dielectric strip is filled in said cutout.
Claim 11
Dependent Claim
37 words
An electromagnetic radiator according to claim 1, characterized in that said asymmetric portion is a recessed portion (14a, 14b, 14c, 14d) formed in a portion of said conductor plate corresponding to the part of said dielectric strip.
Claim 12
Dependent Claim
32 words
An electromagnetic radiator according to claim 11, characterized in that a material (24) whose permittivity is higher than that of the material forming said dielectric strip is filled in said recessed portion.
Claim 13
Dependent Claim
33 words
An electromagnetic radiator according to claim 1, characterized in that the asymmetric portions (14a, 14b) of said dielectric strip (12) are placed at intervals equal to the wavelength of the high-frequency power supplied.
Claim 14
Dependent Claim
47 words
An electromagnetic radiator according to claim 1, characterized in that the asymmetric portions (14a, 14b) of said dielectric strip (12) are arranged alternately on the top face and the bottom face of the dielectric strip at intervals corresponding to half the wavelength of the high-frequency power supplied.
Claim 15
Dependent Claim
50 words
An electromagnetic radiator according to claim 1, characterized in that asymmetric portions (14a, 14b) and reflection cutouts (25) that are vertically symmetric and create reflection internally are formed in said dielectric strip, the asymmetric portions being shifted one-fourth the wavelength of the high-frequency power supplied away from the reflection cutouts.
Claim 16
Dependent Claim
74 words
An electromagnetic radiator according to claim 1, characterized in that the asymmetric portion of said dielectric strip (12) has a pair of cutouts (14b, 14c) formed vertically symmetrically in the same position, with one cutout filled with a material (24) whose permittivity is higher than that of the material for the dielectric strip and the other cutout filled with a material whose permittivity is lower than that of the material for the dielectric strip.
Claim 17
Dependent Claim
61 words
An electromagnetic radiator according to claim 1, characterized in that the ends of said dielectric strips (12d, 12e) are placed close to each other, with asymmetric portions (14) formed at the ends, reflection walls (65) placed on both sides of the ends placed closed to each other, and the ends electromagnetically connected to each other to form a power divider circuit.
Claim 18
Dependent Claim
29 words
An electromagnetic radiator according to claim 1, characterized in that an image plate (26) made of a conductive material is placed along one side of said dielectric strip (12b).
Claim 19
Dependent Claim
52 words
An electromagnetic radiator according to claim 1, characterized in that said conductor plates (81, 82) are placed in at least a part of an IC card provided with a memory circuit (85), a computing circuit (84), and a transmitter circuit (83), with said dielectric strip (89) being placed between the conductor plates.
References Cited (Backward Citations)
DE3210895A1
Cited
US4618865A
Cited
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