Shielded dipole glass antenna with coaxial feed
First Claim
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1. A glass antenna formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, comprising:
- (a) a pair of dipole antenna elements having a strip configuration and disposed to longitudinally extend in one direction, said pair of dipole antenna elements forming in combination a substantially straight line between longitudinal axes thereof;
(b) a central lead wire led out from one end of either one of said dipole antenna elements in a direction substantially perpendicular to the longitudinal axis of said antenna element;
(c) a first shielding lead wire led out from one end of the other dipole antenna element in a direction substantially perpendicular to the longitudinal axis of said antenna element and apart from said central lead wire;
(d) a second shielding lead wire disposed in such a manner that it extends substantially parallel with and apart from said central lead wire and said first shielding lead wire so as to interpose said central lead wire between the same and said first shielding lead wire; and
(e) a pair of balanced-to-unbalanced transformers branching off from the respective intermediate portions of said first and second shielding lead wires so as to extend adjacent to but apart from respective intermediate portions of said pair of dipole antenna elements,whereby washing and garaging of the vehicle are facilitated.
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Abstract
A glass antenna for a vehicle includes a pair of dipole antenna elements, a central lead wire out from one end of either one of the dipole antenna elements, a first shielding lead wire led out from one end of the other dipole antenna element, a second shielding lead wire extending so as to interpose the central lead wire between the same and the first shielding lead wire, and a pair of balanced-to-unbalanced transformers branching off from the respective intermediate portions of the first and second shielding lead wires. Accordingly, washing and garaging of the vehicle are facilitated.
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Citations
18 Claims
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1. A glass antenna formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, comprising:
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(a) a pair of dipole antenna elements having a strip configuration and disposed to longitudinally extend in one direction, said pair of dipole antenna elements forming in combination a substantially straight line between longitudinal axes thereof; (b) a central lead wire led out from one end of either one of said dipole antenna elements in a direction substantially perpendicular to the longitudinal axis of said antenna element; (c) a first shielding lead wire led out from one end of the other dipole antenna element in a direction substantially perpendicular to the longitudinal axis of said antenna element and apart from said central lead wire; (d) a second shielding lead wire disposed in such a manner that it extends substantially parallel with and apart from said central lead wire and said first shielding lead wire so as to interpose said central lead wire between the same and said first shielding lead wire; and (e) a pair of balanced-to-unbalanced transformers branching off from the respective intermediate portions of said first and second shielding lead wires so as to extend adjacent to but apart from respective intermediate portions of said pair of dipole antenna elements, whereby washing and garaging of the vehicle are facilitated. - View Dependent Claims (2, 3, 4)
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5. A glass antenna rigidly formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, said glass antenna comprising:
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a pair of strip dipole antenna elements disposed to longitudinally extend for forming in combination a substantially straight line between longitudinal axes thereof, the width w of said antenna elements being set as follows;
##EQU4## where l;
the overall length of said antenna elementsd;
the thickness of said antenna elementsρ
;
the resistivity of said antenna elementsZth ;
the theoretical impedance of said antenna elementsZ0 ;
the impedance of said feederwhereby washing and garaging of the vehicle are facilitated. - View Dependent Claims (6, 7, 8, 16, 17)
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9. A glass antenna formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, said glass antenna comprising:
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a pair of strip dipole antenna elements disposed to longitudinally extend for forming in combination a substantially straight line between longitudinal axes thereof, the overall length l of said pair of antenna elements is set such as to be 1/√
ε
s '"'"', where ε
s '"'"' represents the apparent specific dielectric constant of said glass at which the gain of said glass antenna is the largest,whereby washing and garaging of the vehicle are facilitated. - View Dependent Claims (10, 11, 12)
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13. A glass antenna formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, said glass antenna comprising:
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(a) a pair of dipole antenna elements having a strip configuration and disposed to longitudinally extend in one direction for forming in combination a substantially straight line between longitudinal axes thereof; (b) a central lead wire led out from one end of either one of said dipole antenna elements in a direction substantially perpendicular to the longitudinal axis of said antenna element; (c) a first shielding level wire led out from one end of the other dipole antenna element in a direction substantially perpendicular to the longitudinal axis of said antenna element and apart from said central lead wire; (d) a second shielding lead wire in such a manner that it extends substantially parallel with and apart from said central lead wire and said first shielding lead wire so as to interpose said central lead wire between the same and said first shielding lead wire; and (e) a pair of balanced-to-unbalanced transformers branching off from the respective intermediate portions of said first and second shielding lead wires so as to extend adjacent to but apart from respective intermediate portions of said dipole antenna elements, wherein width w of said pair of dipole antenna elements is set as follows;
##EQU5## where l;
the overall length of said antenna elementsd;
the thickness of said antenna elementsρ
;
the resistivity of said antenna elementsZth ;
the theoretical impedance of said antenna elementsZ0 ;
the impedance of said feeder,whereby washing and garaging of the vehicle are facilitated.
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14. A glass antenna formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, said glass antenna comprising:
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(a) a pair of dipole antenna elements having a strip configuration and disposed to longitudinally extend in one direction for forming in combination a substantially straight line between longitudinal axes thereof; (b) a central lead wire led out from one end of either one of said dipole antenna elements in a direction substantially perpendicular to the longitudinal axis of said antenna element; (c) a first shielding level wire led out from one end of the other dipole antenna element in a direction substantially perpendicular to the longitudinal axis of said antenna element and apart from said central lead wire; (d) a second shielding lead wire in such a manner that it extends substantially parallel with and apart from said central lead wire and said first shielding lead wire so as to interpose said central lead wire between the same and said first shielding lead wire; and (e) a pair of balanced-to-unbalanced transformers branching off from the respective intermediate portions of said first and second shielding lead wires so as to extend adjacent to but apart from respective intermediate portions of said dipole antenna elements, wherein length l of said pair of dipole antenna elements is set such as to be 1/√
ε
s '"'"', where ε
s '"'"' represents the apparent specific dielectric constant of said glass at which the gain of said glass antenna is the largest,whereby washing and garaging of the vehicle are facilitated. - View Dependent Claims (15)
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18. A glass antenna formed in a pattern on the surface of glass mounted on a vehicle and connected to a feeder, said glass antenna comprising:
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a pair of strip dipole antenna elements disposed to longitudinally extend for forming in combination a substantially straight line between longitudinal axes therefore, the width w of said antenna elements being set as follows;
##EQU6## where l;
the overall length of said antenna elementsd;
the thickness of said antenna elementsρ
;
the resistivity of said antenna elementsZth ;
the theoretical impendance of said antenna elementsZ0 ;
the impedance of said feederwherein length l of said pair of dipole antenna elements is set such as to be 1/√
ε
s '"'"', where ε
s '"'"' represents the apparent specific dielectric constant of said glass at which the gain of said glass antenna is the largest,whereby washing and garaging of the vehicle are facilitated.
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Specification