TECHNICAL FIELD
[0001] The present invention relates to a patch antenna. In particular, it relates to a patch antenna, for payload satellites, incorporated with temperature insensitivity.

BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] In general, satellites use small size antennas to optimize the weight added by communication components. However, the environment of space satellites is complicated. Temperature is one of the trivial environmental factors and is influenced by multiple factors, such as vacuum in space, radiation from the sun and earth, but not limited to the same, which intern causes temperature fluctuation, resulting in the change of dielectric constant of antenna substrate. The high duty cycle for the antenna also results in increase in temperature of the antenna. The temperature fluctuations shift the resonance frequency of the antenna and drift the output signal.
[0004] Hence there is a requirement in art to develop an antenna for space satellites, which is light weight, compact and is temperature insensitive, to get an accurate output signal.

OBJECTS OF THE PRESENT DISCLOSURE
[0005] The general object of the present disclosure is to provide an antenna for installation in payload satellites.
[0006] Another object of the present disclosure is to provide an antenna which is compact in size.
[0007] Another object of the present disclosure is to provide an antenna which is thermally stable.
[0008] Another object of the present disclosure is to provide an antenna which is light in weight.

SUMMARY
[0009] The present disclosure relates to a patch antenna. In particular, it relates to a patch antenna, incorporated with temperature insensitivity.
[0010] In an aspect, the present disclosure provides, a thermally stable antenna, for payload satellites. The thermally stable antenna may include, a substrate with a predefined dielectric constant, wherein the predefined dielectric constant may be thermally stable with low loss tangent. The antenna may also include a radiator element which may be disposed on a surface of the substrate, the radiator may be configured to transmit and receive radio signals at an operational frequency. The antenna may include one or more fins that may be disposed on the radiator element and may include one or more channels, that may be designed on the surface of the substrate that may be adjacent to the one or more fins, wherein the one or more channels may be of a predefined size.
[0011] In another embodiment, a ground plane may be disposed below the substrate.
[0012] In another embodiment, one or more channels may be configured to carry a fluid through the antenna to provide a cooling affect.
[0013] In another embodiment, the substrate may be made of a ceramic material.
[0014] In another embodiment, the antenna may be a patch antenna.
[0015] In another embodiment, the antenna may be optimized for satellite applications.
[0016] In an aspect, the present disclosure provides for a method of fabricating an antenna. The method may include the steps of : synthesizing a substrate which may have a predefined dielectric constant, which may be thermally stable with low loss tangent and a step of a disposing a radiator element which may be on the surface of the substrate and the radiator may be configured to transmit and receive radio signals at an operational frequency. The method may further include the steps of disposing one or more fins on the radiator element; and designing one or more channels on the surface of the substrate that may be adjacent to the one or more fins, wherein the one or more channels may be of a predefined size.
[0017] In another embodiment, the method may further include the step of disposing a ground plane below the substrate.
[0018] In another embodiment, the method may further include the step of configuring the one or more channels to carry a fluid through the antenna to provide a cooling affect.
[0019] In another embodiment, the method may further include the step of optimizing the antenna for satellite applications.
[0020] Various objects, features, aspects, and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments, along with the accompanying drawing figures in which like numerals represent like components.

BRIEF DESCRIPTION OF DRAWINGS
[0021] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain the principles of the present disclosure.
[0022] FIG. 1 illustrates an exemplary representation of an antenna, in accordance with an embodiment of the present disclosure.
[0023] FIG. 2 illustrates a methodical flow of fabrication of an antenna in accordance with an exemplary embodiment of the present disclosure.

DETAILED DESCRIPTION
[0024] Antenna, also called as an arial, is an electrical device that converts electric power into electromagnetic waves / radio waves and vice-versa. A signal or guided wave, from a transmission line or the guiding device, is transmitted to an antenna, which then converts the signal into electromagnetic energy to be transmitted through free space.
[0025] Antennas provide a simple way to transfer signals or data in situations where wireless communication is the only feasible option and antennas are the gateway for it.
[0026] The following is a detailed description of embodiments of the disclosure depicted in the accompanying drawings. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims. The present enclosure relates to a patch antenna. In particular, it relates to a patch antenna, for payload satellites, incorporated with temperature insensitivity.
[0027] FIG. 1 illustrates an exemplary representation of an antenna, in accordance with an embodiment of the present disclosure.
[0028] As illustrated in FIG.1, in an aspect, the antenna may comprise of a substrate 112, a radiator element 114 disposed on a surface of the substrate 112, one or more fins 108 on the radiator element 114 and one or more channels (104, 106) designed on the surface of the substrate 112 and a ground plate 110.
[0029] In an embodiment, the substrate 112, can have a predetermined dielectric constant, the predefined dielectric constant can be thermally stable with low loss tangent.
[0030] In another embodiment, a radiator element 114 disposed on a surface of the substrate 112, the radiator can be configured to transmit and receive radio signals at an operational frequency.
[0031] In an exemplary embodiment, one or more channels (104, 106)(also referred to as pipes herein 104, 106 herein), can be designed on the surface of the substrate 112, adjacent to the one or more fins 108. The one or more channels can be of a predefined size such as micrometer sized pipes, but not limited to the same.
[0032] In another embodiment, a ground plate 110, can be disposed below the substrate 112.
[0033] In another embodiment, a fluid, which may be a coolant, such as silicone fluids, but not limited to the same, can be made to flow through the one or more channels (104, 106). The fluid is passed through the inlet of the one or more channels 104 and is made is flow through till the outlet of the one or more channels 106. The fluid in the one or more channels, may rise naturally, with the increase in temperature. Considering the gravity in the space, the fluid stored in the antenna may rise rapidly, resulting in efficient cooling of the antenna. This process might reduce the dependency on separate cooling assembly fans requirement for the antennas.
[0034] In another embodiment, the antenna 100, can be optimized for the operational frequency with the design of the patch 102 as required. The antenna 100 may also be optimized for space satellite applications, such as telemetry, tracking, command but not limited to the same.
[0035] FIG. 2 illustrates a methodical flow of fabrication of an antenna in accordance with an exemplary embodiment of the present disclosure.
[0036] As illustrated in the FIG.2, the method 200 of fabricating an antenna, may include at 202 the step of synthesizing a substrate 112 with a predefined dielectric constant, wherein the predefined dielectric constant can be thermally stable with low loss tangent, which may provide reliability while facing fluctuations in temperatures. The substrate 112, maybe made of a ceramic material, such as BaTiO3- ceramic based material, but not limited to the same.
[0037] In another exemplary embodiment, the fabrication method 200, may further include at 204, the step of disposing a radiator element on a surface of the substrate. The radiator 114 can be configured to transmit and receive radio signals at an operational frequency. The radiator may be metallic and electromagnetic, but not limited to the same.
The fabrication method 200, may further include at 206 the step of disposing one or more fins, on the radiator element. The fins 108 may be created without impacting the performance of the antenna.
[0038] In another exemplary embodiment, the fabrication method 200, may further include at 208, the step of designing one or more channels on the surface of the substrate. The one or more channels (104, 106) can be adjacent to the one or more fins 108. The one or more channels can be of a predefined size.
[0039] In another exemplary embodiment, the fabrication method 200, may further include at 210, the step of disposing a ground plane below the substrate.
[0040] While the foregoing describes various embodiments of the invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE PRESENT DISCLOSURE
[0041] The present disclosure provides an antenna for installation in payload satellites.
[0042] The present disclosure provides an antenna which is compact in size.
[0043] The present disclosure provides an antenna which is thermally stable.
[0044] The present disclosure provides an antenna which is light in weight.

We Claims:

1. An antenna 100 comprising:
a substrate 112 with a predefined dielectric constant, wherein the predefined dielectric constant is thermally stable with low loss tangent;
a radiator element 114 disposed on a surface of the substrate, the radiator being configured to transmit and receive radio signals at an operational frequency;
one or more fins disposed on the radiator element; and
one or more channels (104, 106), said one or more channels designed on the surface of the substrate adjacent to the one or more fins 108, wherein the one or more channels are of a predefined size.
2. The antenna as claimed in claim 1, wherein a ground plane 110 is disposed below the substrate 112.
3. The antenna as claimed in claim 1, wherein the one or more channels (104, 106) are configured to carry a fluid through the antenna to provide a cooling affect.
4. The antenna claimed in claim 1, wherein the substrate 112 is made of a ceramic material.
5. The antenna as claimed in claim 1, wherein the antenna 100 is a patch 102 antenna.
6. The antenna as claimed in claim 1, wherein the antenna is optimized for satellite applications.
7. A method of fabricating an antenna 200, said method comprising:
synthesizing a substrate with a predefined dielectric constant 202, wherein the predefined dielectric constant is thermally stable with low loss tangent;
disposing a radiator element on a surface of the substrate 204, the radiator being configured to transmit and receive radio signals at an operational frequency;
disposing one or more fins 206 on the radiator element; and
designing one or more channels 208 on the surface of the substrate adjacent to the one or more fins 108, wherein the one or more channels are of a predefined size.
8. The method as claimed in claim 7, wherein the method further comprises:
disposing a ground plane below the substrate 210.
9. The method as claimed in claim 7, wherein the method further comprises:
configuring the one or more channels (104, 106) to carry a fluid through the antenna to provide a cooling affect.
10. The method as claimed in claim 7, wherein the method further comprises:
optimizing the antenna 100 for satellite applications.