Interwoven spiral antenna
First Claim
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1. An interwoven spiral antenna assembly comprising:
- a single transmission interwoven spiral antenna for transmission of RF communication signals comprising;
a first non-inverted spiral section having a spiral shape;
a first inverted spiral section having an inverted spiral shape, wherein the first non-inverted spiral section is coupled to the first inverted spiral section at a center point; and
an excitation region coupled to the first non-inverted spiral section and the first inverted spiral section, wherein, when excited by a first phase shifted signal, the single transmission interwoven spiral antenna has a first circular polarization radiation pattern offset from perpendicular to the single transmission interwoven spiral antenna by phase of excitation of the first phase shifted signal; and
a single reception interwoven spiral antenna for reception of RF communication signals comprising;
a second non-inverted spiral section having a spiral shape;
a second inverted spiral section having an inverted spiral shape, wherein the second non-inverted spiral section is coupled to the second inverted spiral section at a center point; and
an excitation region coupled to the second non-inverted spiral section and the second inverted spiral section, wherein, when excited by a second phase shifted signal, the single reception interwoven spiral antenna has a second circular polarization radiation pattern offset from perpendicular to the single reception interwoven spiral antenna by phase of excitation of the second phase shifted signal.
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Abstract
An interwoven spiral antenna includes a non-inverted spiral section, an inverted spiral section, and an excitation region. The non-inverted spiral section has a spiral shape and the inverted spiral section has an inverted spiral shape. The excitation region is coupled to at least one of the non-inverted spiral section and the inverted spiral section, wherein, when excited, the interwoven spiral antenna has a circular polarization.
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Citations
20 Claims
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1. An interwoven spiral antenna assembly comprising:
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a single transmission interwoven spiral antenna for transmission of RF communication signals comprising; a first non-inverted spiral section having a spiral shape; a first inverted spiral section having an inverted spiral shape, wherein the first non-inverted spiral section is coupled to the first inverted spiral section at a center point; and an excitation region coupled to the first non-inverted spiral section and the first inverted spiral section, wherein, when excited by a first phase shifted signal, the single transmission interwoven spiral antenna has a first circular polarization radiation pattern offset from perpendicular to the single transmission interwoven spiral antenna by phase of excitation of the first phase shifted signal; and a single reception interwoven spiral antenna for reception of RF communication signals comprising; a second non-inverted spiral section having a spiral shape; a second inverted spiral section having an inverted spiral shape, wherein the second non-inverted spiral section is coupled to the second inverted spiral section at a center point; and an excitation region coupled to the second non-inverted spiral section and the second inverted spiral section, wherein, when excited by a second phase shifted signal, the single reception interwoven spiral antenna has a second circular polarization radiation pattern offset from perpendicular to the single reception interwoven spiral antenna by phase of excitation of the second phase shifted signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A Celtic spiral antenna comprises:
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an excitation region coupled to the electromagnetic conductive trace which, when excited by a phase shifted signal, produces a bandwidth having a high frequency comer, a low frequency comer, and a band pass region, wherein the high frequency corner is substantially established by dimensions of the excitation region, the low frequency corner is substantially established by a circumference of the electromagnetic conductive trace, and wherein the band pass region has a substantially constant impedance; and wherein the Celtic spiral antenna has a circular polarization radiation pattern offset from perpendicular to the Celtic spiral antenna by phase of excitation of the phase shifted signal. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An interwoven Celtic spiral antenna comprising:
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an excitation region coupled to at least one of the non-inverted spiral section and the inverted spiral section, wherein, when excited by a phase shifted signal, the interwoven Celtic spiral antenna has a circular polarization; and wherein the interwoven Celtic spiral antenna has a circular polarization radiation pattern offset from perpendicular to the interwoven Celtic spiral antenna by phase of excitation of the phase shifted signal. - View Dependent Claims (19, 20)
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Specification