Microstrip patch antenna using Ku and K band
- 1. Project presentation: Microstrip Patch Antenna Using Ku(12GHz-18GHz) and K(18GHz- 26GHz) band Contributed By: •Khansa Ali •Manoj Pal •Pooja Keshri •Deeksha Under the guidance of: Mr. C. B. Jha Sir
- 2. OUTLINE Introduction How does an antenna work? Antenna characteristics Overview of microstrip patch antenna Elements of patch antenna Shapes of patch Feeding methods Designing process and tools
- 3. Outline(contin’d) Parameters of designing Design specification Model Gain Return loss Advantages Disadvantages Application References
- 4. Introduction : Microstrip Patch Antenna • A Micro-strip patch antenna consists of a radiating patch on one side of a dielectric substrate which has a ground plane on the other side. • Invented by Bob Munson in 1972 (but earlier work by Dechamps goes back to1953).
- 5. How does an Antenna works? • Antenna is one type of transducer that converts the electrical energy into the electro-magnetic energy in form of electromagnetic waves. • Antennas are required by any radio receiver or transmitter to couple its electrical connection to the electromagnetic field.
- 6. Antenna Characteristics •Power gain •Directivity •Antenna radiation patterns •Polarization
- 7. Over view of Micro-strip patch Antenna • In general Microstrip patch antennas are also known as “PRINTED ANTENNAS ”. • Operates on microwave frequencies ( f > 1 GHz). • Invented by Bob Munson in 1972. • Used on rockets & missiles previously. • Became popular starting in the 1970s.
- 8. Elements of Microstrip patch Antenna • Metal “Patch”. • Dielectric Substrate. • Ground Plane. • Microstrip feed.
- 9. Shapes of Patch The patch can take different shapes , such as rectangular, circular, triangular, or U-shaped , E-shaped, etc.
- 10. Feedings methods Micro-strip line feed Capacitive feed • A conducting strip is connected to the edge of the patch. • The feed can be etched on the substrate. • Feeding is done on another smaller patch instead of main radiating patch.
- 11. Feeding methods (contin’d) Co- axial feed Proximity coupled feed • The center conductor is soldered of the conductor is soldered to the patch. • Two dielectric substrate are used such that the feed line is between the two substrates and the radiating patch is on the top.
- 12. Designing Process and Tools : Hardware Software i. FR-4 Epoxy Substrate ii. Coaxial Feed iii. Copper material for finite conductivity i. HFSS 13.0 (High Frequency Structural Simulator
- 13. Parameters of designing There are four essential parameters which are important to know: • The operating frequency (f˳). • Dielectric constant of substrate (𝜀 𝑟). • The height of the dielectric substrate (h). • The height of the conductor (t). The other parameters: • The width of the patch (W) • The length of the patch (L) • The width and length of the Ground plane and the substrate (Wg)(Lg).
- 14. Design specifications • Dielectric constant(εr)= 1 ≤ εr≤ 4 • Frequency (fr) = 12to 26 GHz • Height (h) = 0.7 , λo≤h≤0.05 λo • Velocity of light (c) = 3×10^8 ms-1 . • Practical width (W) = W< λo , , where λo is the freespace wavelength • Practical Length (L) = 0.3333λo< L < 0.5 λo
- 15. Model
- 16. Gain
- 17. Return loss
- 18. Advantages • Easy to fabricate. • Low cost , Less size. • Can be integrated with microwave circuits. • Easy to feed (coaxial cable, microstrip line, etc.) . Easy to use in an array. • When stacking is being done gain is increased.
- 19. Disadvantages • Low gain. • Low efficiency. • Narrow bandwidth.
- 20. Applications • Used in mobile satellite communication system. • Direct broadcast television. • Wireless LAN’S. • Feed element of coaxial system . • Global positioning system. • Missiles , aircraft, spacecraft and telementry. • UHF patch antenna for space. • Radar system, surveillance system, remoat sensing etc. • MIMO(multi input multi output).
- 21. References • Balaris C. A. Antenna theory. • Design of an X-band microstrip patch antenna. • M. M. Islam, M. T. Islam, M. R. I. Faruque, W. Hueyshin Institute of Space Science (ANGKASA). • Study and design of micro-strip patch antenna. Amit Biswas, Diptajit Biswas, Amit Samanta, Saikat Mandal. • Design and simulation of micro-strip patch antenna using CST microwave studio, Aymen Dheya Khaleel.
- 22. Thank you