SCHELKUNOFF ELECTROMAGNETIC WAVES SERIES
Research and analysis of new series of transverse electromagnetic cell. Cape Town: University of Stellenbosch, 2007.ĬUI Furong. Analysis and design of conical transmission line power combiners. IEEE Transactions on Microwave Theory and Techniques, 1983, 31(9): 718–723.ĭIRK I L. On the problem of applying mode-matching techniques in analyzing conical waveguide discontinuities. Hybrid modes in a dielectric lined conical waveguide. Transmission theory of plane electromagneitc waves// Proceedings of the Institute of Radio Engineers, Vikis, September, 1937: 1457–1492. New York: John Wiley and Sons, 1982.ĬONSTANTINE A B. Theory of antennas of arbirary size and shape.
IEEE Transactions on Microwave Theory and Techniques, 2002, 50(10): 1233–1237. The ϕ 0 constant mode in free-space and conical waveguides. London: Peter Peregrinus Press, 1986.īLADEL J V. Modal cutoff in coaxial transmission lines of conical and cylindrical geometries// IEEE MTT-S International Microwave Symposium Digest, Boulder, USA, May 20–25, 2001: 1229–1232. WEIL C M, RIDDLE B F, NOVOTNY D R, et al. Calibration of broadband RF field probes using a coaxial conical transmission line// Proceedings of 14th International Conference on Microwaves Radar and Wireless Communicationse, Boulder, USA, May 20–22, 2002: 404–407. A new broadband RF field standard using a coaxial transmission line of conical geometry: progress report// Proceedings of 23rd AMTA Meeting, Denver, USA, October, 2001: 14–19. IEEE Transaction on Intrumentation and Measurement, 2009, 58(4): 1109–1113. Characterization method of electric field probe by using transfer standard in GTEM cell.
Probe response to a non-uniform e-field in a TEM cell// Conference on Precision Electromagnetic Measurements, Daejeon, Korea, June 13–18, 2010: 327–328. On the use of TEM cells for the calibration of power frequency electric field meters. New York: The Institute of Electrical and Electronics Engineers Inc., 2005. IEEE Std 1309TM - 2005 IEEE Standard for Calibration of Electromagnetic Field Sensors and Probes, Excluding Antennas, from 9 kHz to 40 GHz. Standards Development Committee of the IEEE Electromagnetic Compatibility Society, American National Standards Institute. This paper presents numerical calculation data and theoretical analysis to design key structural parameters for the co-conical transverse electromagnetic wave cell(co-conical TEM cell). The simulation plots show that transmission of high-order modes appears with electromagnetic wave reflection, then different high-order mode transmission has different cut-off region and each cut-off region is determined by its cut-off wavelength.
SCHELKUNOFF ELECTROMAGNETIC WAVES SOFTWARE
The propagation process of the first three transmitting modes wave is simulated in CST-MWS software from the same structured co-conical. Relationship between roots and high-order modes transmission is analyzed, when the half angles of inner conductor and outer conductor are θ 1=1.5136° and θ 2=8° respectively, the co-conical cell has better performance for fewer transmitting high-order modes. The associated Legendre control functions of high-order modes are calculated by using recursion methodology and the numerical calculation roots are presented with different half angles of inner and outer conductor. For designing a high performance cell, a mathematic model of high-order modes transmission is built according to the geometrical construction of co-conical. Existing research is only qualitative because of the complexity of theoretical calculations. In order to solve the problem of broadband field probes calibration with only selected discrete frequencies above 1 GHz, a sweep-frequency calibration technology based on a coaxial conical(co-conical) cell is researched.