Phase delay line for collinear array antenna
First Claim
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1. A collinear antenna array formed on an insulating sheet comprising:
- a first end fed dipole antenna system for a radio frequency generator having an operating wavelength L, comprising;
on a first side of an insulating sheet a first and a second quarter wavelength conductive strip in end-to-end connection;
on a second side of the insulating sheet a third quarter wavelength conductive strip, overlying the first quarter wavelength conductive strip, a fourth quarter wavelength conductive strip having a longer arm spaced from and parallel to the third quarter wavelength conductive strip and a shorter arm connected to the third quarter wavelength conductive strip, and a fifth quarter wavelength conductive strip having a longer arm spaced from and parallel to the third quarter wavelength conductive strip, symmetrical with the fourth quarter wavelength conductive strip, and a shorter arm connected to the third quarter wavelength conductive strip; and
means to connect said radio frequency generator between the end of the third quarter wavelength conductive strip remote from the connection to the fourth quarter wavelength conductive strip, and the corresponding end of the first quarter wavelength conductive strip, whereby the second and fourth quarter wavelength conductive strips form a linear dipole antenna;
wherein the collinear antenna array further comprises;
a feeder stage including a delay line having its input connected to the end of the second quarter wavelength conductive strip remote from the first quarter wavelength conductive strip; and
a monopole comprising a conductive strip having one end connected to the output of the delay line.
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Abstract
A delay line, suitable for use as a feeder stage in an antenna array, comprises a single spiral revolution conductive strip formed on an insulating sheet. In one arrangement, the single spiral revolution conductive strip comprises first to fifth conductive strips connected end-to-end in series. The first and third conductive strips are positioned opposite each other, the third and fifth conductive strips are positioned opposite each other, and the second and fourth conductive strips are positioned opposite each other. The delay line finds particularly advantageous use in a collinear antenna array, particularly due to its very compact size.
53 Citations
9 Claims
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1. A collinear antenna array formed on an insulating sheet comprising:
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a first end fed dipole antenna system for a radio frequency generator having an operating wavelength L, comprising;
on a first side of an insulating sheet a first and a second quarter wavelength conductive strip in end-to-end connection;
on a second side of the insulating sheet a third quarter wavelength conductive strip, overlying the first quarter wavelength conductive strip, a fourth quarter wavelength conductive strip having a longer arm spaced from and parallel to the third quarter wavelength conductive strip and a shorter arm connected to the third quarter wavelength conductive strip, and a fifth quarter wavelength conductive strip having a longer arm spaced from and parallel to the third quarter wavelength conductive strip, symmetrical with the fourth quarter wavelength conductive strip, and a shorter arm connected to the third quarter wavelength conductive strip; and
means to connect said radio frequency generator between the end of the third quarter wavelength conductive strip remote from the connection to the fourth quarter wavelength conductive strip, and the corresponding end of the first quarter wavelength conductive strip, whereby the second and fourth quarter wavelength conductive strips form a linear dipole antenna;
wherein the collinear antenna array further comprises;
a feeder stage including a delay line having its input connected to the end of the second quarter wavelength conductive strip remote from the first quarter wavelength conductive strip; and
a monopole comprising a conductive strip having one end connected to the output of the delay line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
first to fifth conductive strips connected end-to-end in series, the first and third conductive strips being opposite to one another, the third and fifth conductive strips being opposite to one another, and the second and fourth conductive strips being opposite to one another.
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5. A collinear antenna array according to claim 4, wherein the end of the first conductive strip not connected to the second conductive strip is connected to the input by a sixth conductive strip and the end of the fifth conductive strip not connected to the fourth conductive strip is connected to the output by a seventh conductive strip.
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6. A collinear antenna array according to claim 5, wherein the first to sixth conductive strips are formed on a first side of the insulating sheet, and the seventh conductive strip is formed on a second side of the insulating sheet.
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7. A collinear array according to claim 4, in which the third conductive strip is longer than the first conductive strip, the fourth conductive strip is shorter than the second conductive strip, the fifth conductive strip is shorter than the third conductive strip, and the output is located opposite the input.
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8. A collinear antenna array according to claim 3, wherein the single spiral revolution strip comprises:
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a first conductive strip coupled at one end to the input;
a second conductive strip connected at one end to the other end of the first conductive strip and orientated at approximately 90°
thereto;
a third conductive strip connected at one end to the other end of the second conductive strip and orientated at approximately 90°
thereto in a direction opposite to that of the first conductive strip;
a fourth conductive strip connected at one end to the other end of the third conductive strip and orientated at approximately 90°
thereto in a direction opposite to that of the second conductive strip; and
a fifth conductive strip connected at one end to the other end of the fourth conductive strip and orientated at approximately 90°
thereto in a direction opposite to that of the third conductive strip, and coupled at the other end thereof to the output.
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9. A collinear antenna array according to claim 8, wherein the first conductive strip is coupled to the input by a sixth conductive strip connected at one end to the other end of the first conductive strip and orientated at approximately 90°
- thereto in a direction opposite to that of the second conductive strip, and wherein the fifth conductive strip is coupled to the output by a seventh conductive strip connected at one end to the other end of the fifth conductive strip and at its other end to the output, and orientated at approximately 90°
relative to the fifth conductive strip in a direction opposite to the fourth conductive strip.
- thereto in a direction opposite to that of the second conductive strip, and wherein the fifth conductive strip is coupled to the output by a seventh conductive strip connected at one end to the other end of the fifth conductive strip and at its other end to the output, and orientated at approximately 90°
Specification
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Current AssigneeAvago Technologies International Sales Pte Limited (Broadcom, Inc.)
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Original AssigneeAgere Systems Guardian Corp. (Broadcom, Inc.)
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InventorsErkocevic, Nedim
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Primary Examiner(s)LE, HOANGANH T
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Application NumberUS09/338,061Time in Patent Office671 DaysField of SearchH01/Q.904, 343/790, 343/791, 343/792, 343/795, 343/793, 343/796, 343/725, 343/726, 343/702, 343/727, 343/729, 343/730, 333/146, 333/160, 333/161, 333/162, 333/163US Class Current343/790CPC Class CodesH01P 9/02 Helical linesH01Q 1/241 used in mobile communicatio...H01Q 21/10 Collinear arrangements of s...H01Q 9/285 Planar dipole H01Q9/065 tak...H01Q 9/30 with feed to end of elongat...
