Total views : 195
Modelling of a High Power Microwave (HPM) Source using 300 KV Marx Generator and Horn Type Antenna
Objectives: To analyse a High Power Microwave (HPM) source connected to a horn antenna by a mathematical model and feeding it with various pulse shapes to find its response. To estimate the E far-field produced and compare it with experimental measurements. Methods/Statistical analysis: A HPM source is built using spark gap switch and Marx generator. Efforts are made to reduce the rise time of the radiated pulse by experimentally varying the spark gap distance and using different gases as di-electric medium. A peaking switch was then designed that could achieve a rise time of 1 nS. The energy discharged at the spark gap (peaking switch) is radiated using a horn type antenna. Findings: In the numerous simulations it was found that a sharp rising edge of the radiated pulse can be achieved if we could minimize the peaking stage inductance. A sharp rising edge gives high peak radiated power resulting in higher E far-field intensity, which is useful for the intended applications of HPM systems. Experimental results to measure the E far-field were coherent with the mathematical model; however, in order to make the mathematical model more accurate with the practical results, a scaling factor was empirically derived. Application/Improvements: During the experiments a range field product (r.Efar-field ) of more than 200 kV was achieved. Although this compares well with some of the contemporary systems. It is much less than 7.2 MV reported elsewhere. To achieve it, some improvements are required to further reduce the rise time of radiated pulse. This can be done by better impedance matching of the radiating antenna with the peaking stage and improvement in the Marx generator switching stages .
HPM, Pulser, PFN (Pulse Forming Network), Spark-Gap
- Giri DV. High-power electromagnetic radiators: Nonlethal weapons and other applications. Harvard University Press; 2004.
- Verma R, Shyam A, Chaturvedi S, Kumar R, Lathi B, Sarkar P, Chaudhari V, Shukla R, Debnath K, Sharma S, Sonara J, Shah K, Adhikary B, Jigna T, Piyush J. Impulse electromagnetic interference generator. In the 26th International Conference on Power Modulator Symposium and High voltage Workshop; 2004 May. p. 543–6.
- Baum CE. JOLT: A highly directive, very intensive, impulselike radiator. Sensor and Simulation Notes. 2003 Nov; 480:1–36.
- Bindu S, Magalvedekar HA. Electro-dynamic simulation of high-voltage peaking switch. Institute of Electrical and Electronics Engineers (IEEE) Transaction on Plasma Science.2012 Nov; 40(11):3093–9. Crossref.
- Tewari SV, Umbarkar SB, Agarwal R, Saroj PC, Sharma A, Mittal KC et al. Development and analysis of PFN based Marx generator finite integration technique for an antenna load. Institute of Electrical and Electronics Engineers (IEEE) Transaction on Plasma Science. 2013 Oct; 41(10):2684–90. Crossref.
- Umbarkar SB, Bindu S, Mangalvedekar HA, Sharma A, Saroj PC, Mittal KC. Analysis of half TEM horn antenna for high power UWB system. In the 19th Institute of Electrical and Electronics Engineers (IEEE) Conference on Pulsed Power; 2013 Jun. p. 1–6.
- Umbarkar SB, Bindu S, Mangalvedeker HA, Sharma A, Chakravarthy DP, Saroj PC, Mittal KC, Chakravarthy DP.Modeling and analysis of half TEM horn antenna and jolt antenna for high power UWB application: a comparativestudy. The National Symposium on High Power RF & Microwaves (HPRFM), Gujarat, India; 2013 Sep 4–6.
- Andrews JR. UWB signal sources, antennas and propagation.Picosecond Pulse Labs; 2003 Aug. p. 1–11.
- Baum CE, Farr EG, Giri DV. Review of impulse-radiating antennas. Stone WR editor, Oxford University Press. 1999; 16:403–39.
- Farr EG, Baum CE. A model of small-angle TEM horns.Sensor and Simulation Notes; 1992. p. 340.
- Kolokotronis DA, Huang Y, Zhang JT. Design of TEM horn antennas for impulse radar. High Frequency Postgraduate Student Colloquim, University of Leeds. 1999 Sep; 2(2):1–9.
- Abramowitz M, Stegun IA. Handbook of mathematical function. National Bureau of standards; 1967. p. 1–1040.
- Ludeking L, Woods A, Cavey L. Magic user manual 3.2. Alliant Techsystems, U.S.A; 2011.
- Lehr JM, Burger JW, Prather WD, Hull J, Abdalla MD, Skipper MC, Giri DV. Evaluation of resistors for transient high-voltage applications. 12th Institute of Electrical and Electronics Engineers (IEEE) International Conference Pulse power conference, Monterey, CA; 1999 Jun. p. 666–9.Crossref
- Sifuzzaman M, Islam MR, Ali MZ. Applications of the wavelet transform and its advantages compared to the Fourier transform. Journal of Physical Science. 2009 Oct; 13:121–34.
- There are currently no refbacks.
This work is licensed under a Creative Commons Attribution 3.0 License.