Helical antenna and communication apparatus
First Claim
Patent Images
1. A helical antenna comprising:
- a base body made of a dielectric material or a magnetic material; and
a helically-configured conductor formed at least either on a top surface of the base body or in an interior thereof, wherein, in the base body, a thickness a (mm) is kept in a range of 0.3≦
a≦
3 (mm);
a length b (mm) is kept in a range of 5≦
b≦
20 (mm); and
a relative dielectric constant ε
r is kept in a range of 3≦
ε
r≦
30 or a relative magnetic permeability μ
r is kept in a range of 1≦
μ
r≦
8, and also a number of winding x (turn) of the conductor is kept in a range of 3≦
x≦
16, and wherein a resonant frequency f (MHz) and a width w (mm) of the conductor satisfy following formulae (1) and (2), respectively;
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Accused Products
Abstract
The helical antenna comprises a base body and a helically-configured conductor on a top surface of the base body, wherein base body'"'"'s thickness a is given as 0.3≦a≦3 (mm); length b is given as 5≦b≦20 (mm); and relative dielectric constant εr is given as 3≦εr≦30, and conductor'"'"'s winding number x is given as 3≦x≦16 (turns), and its resonant frequency f and conductor width w satisfy formulae (1): f=Ax+By+C (MHz) and (2): w=Dx+E (mm), where y represents base body width and A through E represent constants determined according to the base body'"'"'s thickness a, length b, and relative dielectric constant εr.
10 Citations
8 Claims
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1. A helical antenna comprising:
-
a base body made of a dielectric material or a magnetic material; and
a helically-configured conductor formed at least either on a top surface of the base body or in an interior thereof, wherein, in the base body, a thickness a (mm) is kept in a range of 0.3≦
a≦
3 (mm);
a length b (mm) is kept in a range of 5≦
b≦
20 (mm); and
a relative dielectric constant ε
r is kept in a range of 3≦
ε
r≦
30 or a relative magnetic permeability μ
r is kept in a range of 1≦
μ
r≦
8, and also a number of winding x (turn) of the conductor is kept in a range of 3≦
x≦
16,and wherein a resonant frequency f (MHz) and a width w (mm) of the conductor satisfy following formulae (1) and (2), respectively;
- View Dependent Claims (2, 3, 4)
-
-
5. A communication apparatus comprising a helical antenna including:
-
a base body made of a dielectric material or a magnetic material; and
a helically-configured conductor formed at least either on a top surface of the base body or in an interior thereof, wherein, in the base body of the helical antenna, a thickness a (mm) is kept in a range of 0.3≦
a≦
3 (mm);
a length b (mm) is kept in a range of 5≦
b≦
20 (mm); and
a relative dielectric constant ε
r is kept in a range of 3≦
ε
r≦
30 or a relative magnetic permeability μ
r is kept in a range of 1≦
μ
r≦
8, and also a number of winding x (turn) of the conductor is kept in a range of 3≦
x≦
16,and wherein a resonant frequency f (MHz) and a width w (mm) of the conductor satisfy following formulae (1) and (2), respectively;
f=Ax+By+C(MHz)
(1) - View Dependent Claims (6, 7, 8)
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Specification
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- Resources
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Current AssigneeKyocrea Corporation
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Original AssigneeKyocera Corporation
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InventorsMurakawa, Shunichi, Sato, Akinori, Watada, Kazuo, Yoshizaki, Hiroshi
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Primary Examiner(s)Ho, Tan
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Assistant Examiner(s)Dinh, Trinh Vo
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Application NumberUS10/388,388Publication NumberTime in Patent Office621 DaysField of SearchH01/Q.136, H01/Q.140, H01/Q.138, 343/895, 343/873, 343/787, 343/702, 343/700.MS, 343/806US Class Current343/895CPC Class CodesH01Q 1/362 for broadside radiating hel...H01Q 1/38 formed by a conductive laye...H01Q 1/40 Radiating elements coated w...H01Q 11/08 Helical antennas
