Abstract

Objectives: To design a hex band microstrip envelope patch antenna that would serve multiple space applications including radio astronomy, space research, aviation communication, RF devices, ISM equipment, amateur radio, satellite communications, mobile except aeronautical mobile and fixed microwave.

Methods/Statistical analysis: The proposed geometry utilizes numerical Finite Element Method that would subdivide a large problem into smaller, simple parts, called finite elements. The simple equations modelling these finite elements are finally grouped into a system of larger equations that would model the entire problem. FEM next uses various methods from the calculus of variations to approximate a solution by minimizing an associated error function. The proposed antenna geometry uses a FR4 epoxy substrate with aprobe feeding technique. The design has been analysed in terms of reflection coefficient, bandwidth, radiation pattern, gain, directivity, and VSWR and field patterns.

Findings: Using HFSS based on FEM, the design has been analysed in several aspects. Compared to both single band rectangular and circular reference MSA’s, the proposed multi band design offers highly improved characteristics as listed in Table

Application/Improvements: The structure is suited for multi band applications. The 110 MHz bandwidth extending from 4.99 GHz to 5.1 GHz may be used for radio astronomy, space research and aviation communication (radio location and radio navigation), 160 MHz bandwidth of 5.66 GHz to 5.82 GHz may be utilised for RF devices, ISM equipment and amateur radio. The 300 MHz bandwidth extending from 7.47 GHz to 7.77 GHz may be used for satellite communication, the 900 MHz bandwidth extending from 9.02 GHz to 9.92 GHz can be put forth to radio location and aeronautical radio navigation applications and finally the 260 MHz bandwidth of 11.29 GHz to 11.55 GHz can be used for mobile except aeronautical mobiles and fixed microwave.

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Abstract

Objectives: To design a triple band microstrip delete patch antenna to be used mainly for satellite communications. The structure may be utilized additionally for RF devices and aviation.

Methods/Statistical analysis: The proposed geometry uses numerical Finite Element Method to subdivide a large problem into small and simple finite elements. The applied simple equations modelling these finite elements are then stacked into a wider system of equations that would represent the entire problem. Various methods from the calculus of variations then approximate a solution by minimizing an associated error function. The proposed antenna geometry uses a 1.6 mm FR4 epoxy substrate with a probe feeding technique. The used software is HFSS. The design has been analysed in terms of reflection coefficient, bandwidth, radiation pattern, gain, directivity and VSWR.

Findings: Using HFSS based on FEM, the design has been analysed in several aspects. Compared to both single band rectangular and circular reference MSA’s, the proposed multi band design offers highly improved characteristics as listed in Table.

Application/Improvements: The structure is suited mainly for satellite applications. The 50 MHz bandwidth extending from 3.79 GHz to 3.84 GHz may be used for satellite communications and fixed microwave, the 80 MHz bandwidth from 4.63 GHz to 4.71 GHz for fixed satellite applications and the 210 MHz bandwidth extending from 5.21 GHz to 5.42 GHz may be used for RF devices, satellite communications and aviation.

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Abstract

Background/Objectives: To design a mono band microstrip slotted power button antenna intended to serve aviation communication involving radio location and aeronautical radio navigation.

Methods/Statistical analysis: The proposed geometry uses numerical Finite Element Method (also called the finite element analysis) technique that tries to approximate boundary value problem solutions for the case of partial differential equations. It subdivides a larger problem into small and simple finite elements which are represented by simple equations that are finally assembled into a larger system of equations representing the entire problem. Different methods from the calculus of variations are used to approximate a solution by minimizing the associated error function. The proposed antenna geometry uses a FR4 epoxy substrate with a coaxial/probe feeding technique. The design has been analysed in terms of reflection coefficient, bandwidth, radiation pattern, gain, directivity, VSWR and field overlays.

Findings: Using HFSS based on FEM, the design has been analysed in several aspects. Compared to a hexagonal shaped MSA that has been used as a reference, the proposed structure has an improved gain by a factor of 3.72 dBi and a reflection coefficient reduced by a factor of 1.91.

Application/Improvements: The structure is fit to be used for aviation communication/radio determination including radio location and aeronautical radio navigation.

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Abstract

Background/Objectives: To design a single band microstrip shivling patch antenna intended to serve aviation communication including radio location and aeronautical radio navigation.

Methods/Statistical analysis: The proposed geometry uses numerical Finite Element Method (also called the finite element analysis) technique that attempts to find approximate solutions to boundary value problems for partial differential equations. The proposed antenna geometry uses a FR4 epoxy substrate with a coaxial/probe feeding technique. The design has been analysed in terms of reflection coefficient, bandwidth, radiation pattern, gain, directivity, VSWR and field overlays.

Findings: Using HFSS based on FEM, the design has been analysed in several aspects. Compared to a conventional rectangular MSA, the proposed structure has a gain higher by a factor of 13.36 dBi and a bandwidth improvement of 39.07%. The design is thus ahead in terms of its functionality and results compared to the rectangular counterpart.

Application/Improvements: The novel structure may be used for aviation communication including radio location and aeronautical radio navigation.

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