Towards faithful radio transmission of very wide bandwidth signals

The necessary characteristics are derived for an antenna system which is to transmit efficiently and faithfully a very wide bandwidth (of an octave or more) signal. It is demonstrated that a suitable antenna for such a system may radiate isotropically in azimuth but be focused in all vertical planes. It is shown that a phase-corrected conical monopole is a convenient approximate realization of the antenna. Results are presented of an experimental investigation (inferring frequency responses from nanosecond time-domain-reflectometer techniques) of the driving-point and far-field responses of conical monopoles phase-corrected with cylindrically symmetrical lenses. Included is an experimental verification of previous theoretical predictions of the frequency dependence of the radiation which occurs when a transient is radiated from the base and the tip of a thin cylindrical monopole.

[1]  Tai Tsun Wu,et al.  Theory of the Dipole Antenna and the Two‐Wire Transmission Line , 1961 .

[2]  C. Harrison,et al.  Transients in wide-angle conical antennas , 1965 .

[3]  G. D. Bergland,et al.  A guided tour of the fast Fourier transform , 1969, IEEE Spectrum.

[4]  G. A. Burrell.  Transients in antennas , 1971 .

[5]  J. Andersen.  Admittance of Infinite and Finite Cylindrical Metallic , 1968 .

[6]  Tai Tsun Wu,et al.  Transient Response of a Dipole Antenna , 1961 .

[7]  V. Rumsey.  Frequency independent antennas , 1966 .

[8]  P. Fenster,et al.  Members of the class of TEM mode wire antennas with a TLIR , 1968 .

[9]  Charles Manneback.  Radiation from Transmission Lines , 1923, Transactions of the American Institute of Electrical Engineers.

[10]  A. M. Nicolson.  Broad-Band Microwave Transmission Characteristics from a Single Measurement of the Transient Response , 1968 .

[11]  L. Susman,et al.  Applications of Time-Domain Metrology to the Automation of Broad-Band Microwave Measurements , 1972 .

[12]  R. Collin.  Antenna theory , 1969 .

[13]  Ronold W. P. King,et al.  The transient response of linear antennas and loops , 1962 .

[14]  A. M. Nicolson,et al.  Measurement of the Intrinsic Properties of Materials by Time-Domain Techniques , 1970 .

[15]  G. Ross.  A time domain criterion for the design of wideband radiation elements , 1968 .

[16]  W. L. Barrow,et al.  Biconical Electromagnetic Horns , 1939, Proceedings of the IRE.

[17]  G. F. Ross.  The Synthetic Generation of Phase-Coherent Microwave Signals For Transient Behavior Measurements (Correspondence) , 1965 .

[18]  Charles W. Harrison,et al.  On the transient response of an infinite cylindrical antenna , 1967 .

[19]  W. L. Barrow,et al.  The Sectoral Electromagnetic Horn , 1939, Proceedings of the IRE.

[20]  R. S. Elliott,et al.  Pulse Waveform Degradation Due to Dispersion in Waveguide , 1957 .

[21]  J. Dyson.  The equiangular spiral antenna , 1959 .

[22]  T. Wu,et al.  Transient response of linear antennas driven from a coaxial line , 1963 .

[23]  C. Papas.  On the Infinitely Long Cylindrical Antenna , 1949 .

[24]  Hans J. Schmitt.  Transients in cylindrical antennae , 1960 .

[25]  Henry Jasik,et al.  Antenna engineering handbook , 1961 .

[26]  J. Anderson.  Admittance of infinite and finite cylindrical metallic antennas , 1967 .

[27]  H. J. Schmitt,et al.  Calculated and experimental response of thin cylindrical antennas to pulse excitation , 1966 .