ANTENNA APPARATUS CAPABLE OF REDUCING DECREASES IN GAIN AND BANDWIDTH

• US 20140320379A1
• Filed: 07/14/2014
• Published: 10/30/2014
• Est. Priority Date: 01/28/2013
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: HAMABE, Taichi
• Granted Patent: US 9,692,140 B2
• Time in Patent Office: Days
• US Class Current: 343/893
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/523 between antennas of an array
• CPC Class Codes: H01Q 21/0075 Stripline fed arrays H01Q21/065 takes precedence
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H01Q 9/42 with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Abstract

An antenna apparatus is provided with an antenna and a ground conductor plate. The antenna is provided with: a dielectric substrate having a first surface and a second surface; a feed element having a strip shape and formed on the first surface of the dielectric substrate, the feed element having a first end connected to a feeding point, and an opened second end; and a parasitic element having a strip shape and formed on the second surface of the dielectric substrate, the parasitic element having a first end connected to the ground conductor plate, and an opened second end. The feed element and the parasitic element are arranged to oppose each other, at at least a portion including the second end of the feed element and the second end of the parasitic element.

Claims

1-8. -8. (canceled)

9. An antenna apparatus comprising at least one antenna and a ground conductor plate,

wherein each of the at least one antenna comprises:

a dielectric substrate having a first surface and a second surface;

a first feed element having a strip shape and formed on the first surface of the dielectric substrate, the first feed element having a first end connected to a feeding point, and the first feed element having an opened second end; and

a parasitic element having a strip shape and formed on the second surface of the dielectric substrate, the parasitic element having a first end connected to the ground conductor plate, and the parasitic element having an opened second end,

wherein the first feed element and the parasitic element are arranged to oppose each other, at at least a portion including the second end of the first feed element and the second end of the parasitic element, and

wherein each of the at least one antenna further comprises a second feed element having a strip shape and formed on the first surface of the dielectric substrate, the second feed element having a first end and a second end, the first and second ends of the second feed element being connected to different positions on the first feed element, respectively.

10. The antenna apparatus according to claim 9,

wherein the first feed element and the parasitic element are arranged to be capacitively coupled to each other, at at least a portion including the second end of the first feed element and the second end of the parasitic element,

wherein the first feed element and the parasitic element resonate at a first frequency corresponding to a first wavelength determined by a sum of an electric length of the first feed element and an electric length of the parasitic element,

wherein the first feed element, the second feed element, and the parasitic element resonate at a second frequency corresponding to a second wavelength determined by a sum of:

an electric length of the first feed element from the first end of the first feed element to a position connected to the second feed element, an electric length of the second feed element, an electric length of the first feed element from the second end of the first feed element to a position connected to the second feed element, and an electric length of the parasitic element, and

wherein the second feed element is arranged to be capacitively coupled to the first feed element, at at least a portion between the first end and the second end of the second feed element.

11. The antenna apparatus of claim 9 comprising:

a plurality of feeding points; and

a plurality of antennas connected to the plurality of feeding points, respectively.

12. The antenna apparatus according to claim 11, wherein at least one of the plurality of antennas has a different polarization direction from those of the other antennas.

13. The antenna apparatus of claim 9, further comprising at least one monopole antenna.

14. The antenna apparatus according to claim 9, wherein the antenna apparatus is provided in an electronic apparatus comprising a planar conductor component, and wherein the ground conductor plate is the planar conductor component.

15-16. -16. (canceled)

17. A wireless communication apparatus comprising:

an antenna apparatus; and

a wireless communication circuit configured to perform at least one of transmission and reception of radio signals using the antenna apparatus,

wherein the antenna apparatus comprises at least one antenna and a ground conductor plate,

wherein each of the at least one antenna comprises;

a dielectric substrate having a first surface and a second surface;

a first feed element having a strip shape and formed on the first surface of the dielectric substrate, the first feed element having a first end connected to a feeding point, and the first feed element having an opened second end; and

a parasitic element having a strip shape and formed on the second surface of the dielectric substrate, the parasitic element having a first end connected to the ground conductor plate, and the parasitic element having an opened second end,

wherein the first feed element and the parasitic element are arranged to oppose each other, at at least a portion including the second end of the first feed element and the second end of the parasitic element, and

wherein each of the at least one antenna further comprises a second feed element having a strip shape and formed on the first surface of the dielectric substrate, the second feed element having a first end and a second end, the first and second ends of the second feed element being connected to different positions on the first feed element, respectively.

18. An electronic apparatus comprising a wireless communication apparatus,

wherein the wireless communication apparatus comprises:

an antenna apparatus; and

a wireless communication circuit configured to perform at least one of transmission and reception of radio signals using the antenna apparatus,

wherein the antenna apparatus comprises at least one antenna and a ground conductor plate,

wherein each of the at least one antenna comprises;

a dielectric substrate having a first surface and a second surface;

a first feed element having a strip shape and formed on the first surface of the dielectric substrate, the first feed element having a first end connected to a feeding point, and the first feed element having an opened second end; and

a parasitic element having a strip shape and formed on the second surface of the dielectric substrate, the parasitic element having a first end connected to the ground conductor plate, and the parasitic element having an opened second end,

wherein the first feed element and the parasitic element are arranged to oppose each other, at at least a portion including the second end of the first feed element and the second end of the parasitic element, and

wherein each of the at least one antenna further comprises a second feed element having a strip shape and formed on the first surface of the dielectric substrate, the second feed element having a first end and a second end, the first and second ends of the second feed element being connected to different positions on the first feed element, respectively.