Antenna device and communication device

• US 20010010507A1
• Filed: 01/16/2001
• Published: 08/02/2001
• Est. Priority Date: 01/20/2000
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Hiroshima, Motoharu, Kato, Hideyuki
• Granted Patent: US 6,426,725 B2
• Time in Patent Office: Days
• US Class Current: 343/853
• CPC Class Codes: H01P 1/2056 Comb filters or interdigital filters with metallised resonator holes in a dielectric block
• CPC Class Codes: H01P 5/10 for coupling balanced lines or devices with unbalanced lines or devices
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence

Abstract

A communication device in which the problem caused by separately providing an antenna and a filter directly connected thereto, and the problem caused by separately providing a balanced-to-unbalanced transformer, have been solved. A dielectric filter having a both-end opened λ/2 resonator is constructed by providing inner-conductor forming holes in a dielectric block. An antenna is constructed by forming a radiation electrode and terminal electrodes on a dielectric block. By bonding the antenna and dielectric filter, an antenna device is achieved which has a balanced feed antenna and which performs the input-output of unbalanced signals.

Claims

1. An antenna device comprising:

a first resonator formed by opening both ends of a λ

/2 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to a vicinity of one of the open ends of the first resonator is used as an unbalanced input-output portion, and in which a portion connected to the second resonator is used as a balanced input-output portion; and

a balanced feed antenna coupled with said balanced input-output portion.

5. The antenna device as claimed in

claim 1

, wherein:

each of said λ

/2 TEM resonator and λ

/2 TEM resonator comprises a microstrip line or a strip line.

9. The antenna device as claimed in

claim 1

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

14. The antenna device as claimed in

claim 1

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

19. The antenna device as claimed in

claim 1

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

24. The antenna device as claimed in

claim 1

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

29. The antenna device as claimed in

claim 1

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

34. The antenna device as claimed in

claim 1

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

39. The antenna device as claimed in

claim 34

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

2. An antenna device comprising:

a first resonator formed by short-circuiting both ends of two λ

/4 TEM resonators which are connected together, or formed by short-circuiting both ends of a λ

/2 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to a vicinity of an equivalent open end of the first resonator is used as an unbalanced input-output portion, and in which a portion connected to the second resonator is used as a balanced input-output portion; and

a balanced feed antenna coupled with said balanced input-output portion.

6. The antenna device as claimed in

claim 2

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

10. The antenna device as claimed in

claim 2

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

15. The antenna device as claimed in

claim 2

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

20. The antenna device as claimed in

claim 2

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

25. The antenna device as claimed in

claim 2

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

30. The antenna device as claimed in

claim 2

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

35. The antenna device as claimed in

claim 2

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

40. The antenna device as claimed in

claim 35

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

3. An antenna device comprising:

a first resonator formed by short-circuiting one end of a λ

/4 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to a vicinity of the open end of the first resonator is used as an unbalanced input-output portion, and in which a portion connected to the second resonator is used as a balanced input-output portion; and

a balanced feed antenna coupled with said balanced input-output portion.

7. The antenna device as claimed in

claim 3

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

11. The antenna device as claimed in

claim 3

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

16. The antenna device as claimed in

claim 3

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

21. The antenna device as claimed in

claim 3

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

26. The antenna device as claimed in

claim 3

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

31. The antenna device as claimed in

claim 3

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

36. The antenna device as claimed in

claim 3

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

41. The antenna device as claimed in

claim 36

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter .

4. An antenna device comprising:

a first resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to vicinities of the open ends of the first resonator is used as a first balanced input-output portion, and in which a portion connected to vicinities of the open ends of the second resonator is used as a second balanced input-output portion; and

a balanced feed antenna coupled with said first or second balanced input-output portion.

8. The antenna device as claimed in

claim 4

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

12. The antenna device as claimed in

claim 4

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

17. The antenna device as claimed in

claim 4

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

22. The antenna device as claimed in

claim 4

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

27. The antenna device as claimed in

claim 4

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

32. The antenna device as claimed in

claim 4

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

37. The antenna device as claimed in

claim 4

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

42. The antenna device as claimed in

claim 37

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

13. An antenna device comprising:

a dielectric filter having a resonator which resonates in modes other than the TEM mode and which is constructed by forming a conductor film on an outer surface of a dielectric block, and having a balanced input-output portion coupled with said resonator; and

a balanced feed antenna coupled with said balanced input-output portion.

18. The antenna device as claimed in

claim 13

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

23. The antenna device as claimed in

claim 13

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

28. The antenna device as claimed in

claim 13

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

33. The antenna device as claimed in

claim 13

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

38. The antenna device as claimed in

claim 13

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

43. The antenna device as claimed in

claim 38

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

44. A communication device comprising at least one of a transmitter and a receiver, and an antenna device coupled to the at least one of the transmitter and receiver, the antenna device comprising:

a first resonator formed by opening both ends of a λ

/2 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to a vicinity of one of the open ends of the first resonator is used as an unbalanced input-output portion, and in which a portion connected to the second resonator is used as a balanced input-output portion; and

a balanced feed antenna coupled with said balanced input-output portion.

48. The communication device of

claim 44

, wherein each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

52. The communication device of

claim 44

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

57. The communication device of

claim 44

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

62. The communication device of

claim 44

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

67. The communication device of

claim 44

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

72. The communication device of

claim 44

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

77. The communication device of

claim 44

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

82. The communication device of

claim 77

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter

45. A communication device comprising at least one of a transmitter and a receiver, and an antenna device coupled to the at least one of the transmitter and receiver, the antenna device comprising:

a first resonator formed by short-circuiting both ends of two λ

/4 TEM resonators which are connected together, or formed by short-circuiting both ends of a λ

/2 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to a vicinity of an equivalent open end of the first resonator is used as an unbalanced input-output portion, and in which a portion connected to the second resonator is used as a balanced input-output portion; and

a balanced feed antenna coupled with said balanced input-output portion.

49. The communication device of

claim 45

, wherein each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

53. The communication device of

claim 45

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

58. The communication device of

claim 45

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

63. The communication device of

claim 45

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

68. The communication device of

claim 45

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

73. The communication device of

claim 45

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

78. The communication device of

claim 45

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

83. The communication device of

claim 78

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

46. A communication device comprising at least one of a transmitter and a receiver, and an antenna device coupled to the at least one of the transmitter and receiver, the antenna device comprising:

a first resonator formed by short-circuiting one end of a λ

/4 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to a vicinity of the open end of the first resonator is used as an unbalanced input-output portion, and in which a portion connected to the second resonator is used as a balanced input-output portion; and

a balanced feed antenna coupled with said balanced input-output portion.

50. The communication device of

claim 46

, wherein each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

54. The communication device of

claim 46

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

59. The communication device of

claim 46

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

64. The communication device of

claim 46

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

69. The communication device of

claim 46

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

74. The communication device of

claim 46

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

79. The communication device of

claim 46

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

84. The communication device of

claim 79

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

47. A communication device comprising at least one of a transmitter and a receiver, and an antenna device coupled to the at least one of the transmitter and receiver, the antenna device comprising:

a first resonator formed by opening both ends of the two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a second resonator formed by opening both ends of two λ

/4 TEM resonators which are connected together, or formed by opening both ends of a λ

/2 TEM resonator;

a dielectric filter in which the first and second resonators are coupled together, in which a portion connected to vicinities of the open ends of the first resonator is used as a first balanced input-output portion, and in which a portion connected to vicinities of the open ends of the second resonator is used as a second balanced input-output portion; and

a balanced feed antenna coupled with said first or second balanced input-output portion.

51. The communication device of

claim 47

, wherein each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a microstrip line or a strip line.

55. The communication device of

claim 47

, wherein:

each of said λ

/2 TEM resonator and λ

/4 TEM resonator comprises a dielectric coaxial resonator formed by providing a conductor film on a dielectric block.

60. The communication device of

claim 47

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

65. The communication device of

claim 47

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

70. The communication device of

claim 47

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

75. The communication device of

claim 47

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

80. The communication device of

claim 47

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

85. The communication device of

claim 80

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.

56. A communication device comprising at least one of a transmitter and a receiver, and an antenna device coupled to the at least one of the transmitter and receiver, the antenna device comprising:

a dielectric filter having a resonator which resonates in modes other than the TEM mode and which is constructed by forming a conductor film on an outer surface of a dielectric block, and having a balanced input-output portion coupled with said resonator; and

a balanced feed antenna coupled with said balanced input-output portion.

61. The communication device of

claim 56

, wherein:

said dielectric filter is used as a dielectric duplexer comprising a transmission filter and a reception filter.

66. The communication device of

claim 56

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are connected together on a line of a substrate.

71. The communication device of

claim 56

, wherein:

the balanced input-output portion of said dielectric filter and said balanced feed antenna are directly connected together by bonding said dielectric filter and said balanced feed antenna.

76. The communication device of

claim 56

, wherein:

said balanced feed antenna is constructed on a dielectric block in which a balanced feed terminal is formed on an outer surface thereof.

81. The communication device of

claim 56

, wherein:

said balanced feed antenna and said dielectric filter are formed integrally with a dielectric block.

86. The communication device of

claim 81

, wherein:

an effective permittivity of said dielectric block is different between a portion of said dielectric block comprising said balanced feed antenna and a portion of said dielectric block comprising said dielectric filter.