Device for receiving / transmitting electromagnetic waves with omnidirectional radiation

• US 20030020663A1
• Filed: 05/21/2002
• Published: 01/30/2003
• Est. Priority Date: 05/23/2001
• Status: Active Grant

• Current Assignee: Thomson Licensing SA (Vantiva SA)
• Original Assignee: Thomson Licensing SA (Vantiva SA)
• Inventors: Louzir, Ali, Bolzer, Francoise Le
• Granted Patent: US 6,724,346 B2
• Time in Patent Office: Days
• US Class Current: 343/770
• 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 13/085 Slot-line radiating ends
• CPC Class Codes: H01Q 13/106 Microstrip slot antennas patch antenna elements H01Q9/0407
• CPC Class Codes: H01Q 19/30 the primary active element being centre-fed and substantially straight, e.g. Yagi antenna
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00

Abstract

The present invention relates to a device for receiving/transmitting electromagnetic waves with omnidirectional radiation of the type comprising:

a first set (100a, 100b, 100c, 100d) of means for receiving/transmitting waves with longitudinal radiation of the printed antenna type, the said means being arranged in order to receive a wide azimuthal sector and at least a second means (104) for receiving/transmitting waves with transverse radiation of the printed antenna type, the second means having radiation complementary to the radiation of the first means, and means (103) capable of connecting in emission the said first and second wave receiving/transmitting means.

The invention is especially applicable to domestic networks.

Claims

1. - Device for receiving/transmitting electromagnetic waves with omnidirectional radiation of the antenna type comprising:

a first set means for receiving/transmitting waves with longitudinal radiation of the printed antenna type, the said means being arranged in order to receive a wide azimuthal sector,

at least a second means for receiving/transmitting waves with transverse radiation of the printed antenna type, the second means having radiation complementary to the radiation of the first means, and means capable of connecting in emission the said first and second wave receiving/transmitting means.

2. - Device according to claim 1, characterized in that each means for receiving/transmitting waves with longitudinal radiation of the printed antenna type consists of a printed antenna of the Vivaldi antenna.

3. - Device according to claim 2, characterized in that the antennas are arranged at regular intervals around a single point and are coplanar so as to be able to radiate over a 360°

angle sector.

4. - Device according to claim 1, characterized in that each means for receiving/transmitting waves with longitudinal radiation of the printed antenna type consists of a Yagi antenna type.

5. - Device according to claim 4, characterized in that the antennas are arranged at regular intervals around a single point and are coplanar so as to be able to radiate over a 360°

angle sector.

6. - Device according to claim 1, characterized in that the second means for receiving/transmitting waves of the printed type consists of a slot which is symmetrical with respect to a point.

7. - Device according to claim 1, characterized in that the second means for receiving/transmitting waves of the printed type consists of an antenna of the patch type.

8. - Device according to any one of claims 1, characterized in that the first set of means for receiving/transmitting waves with longitudinal radiation and the second means for receiving/transmitting waves with transverse radiation are produced on the same substrate so as to be symmetric about the same point.

9. - Device according to any one of claim 1, characterized in that the means capable of connecting in emission the first set of means for receiving/transmitting waves with longitudinal radiation and the second means for receiving/transmitting waves with transverse radiation consist of a common feed line produced in printed technology.

10. - Device according to claim 9, characterized in that the common feed line consists of a line crossing all the slots of the printed slot antennas constituting the first receiving/transmitting set and the second receiving/transmitting means of the slot type, the length of the line between two slots of the first set being equal at the central operating frequency of the system to kλ

_m, the length of the line between the last slot of the first set and the slot of the second receiving/transmitting means being equal at the central operating frequency of the system to kλ

_m/2 and the length of the line between the end of the line and the slot of the second receiving/transmitting means being equal to k′

λ

_m/4 where λ

_m=λ

₀/{square root}ε

_reff where λ

₀ is the wavelength in vacuo and ε

_reff is the equivalent permittivity of the line, k is an integer and k′

is another odd integer.

11. - Device according to claim 9, characterized in that the common feed line consists of a line crossing all of the slots of the printed slot antennas constituting the first receiving/transmitting set, the length of the line between two slots of the first set is kλ

_m and the length of the line between the last slot of the first set and the second receiving/transmitting means of the patch type being equal at the central operating frequency of the system to kλ

_m/2 where λ

_m=λ

₀/{square root}ε

_reff where λ

₀ is the wavelength in vacuo, k an integer and ε

reff the equivalent permittivity of the line.