Toshihiko YAHARA Yoshinobu KADOWAKI Hidejiro MIKI
Diode phase shifters are analytically and numerically studied in order to reduce to reduce DC power requirement, and to improve their performances. The residual series resistance of PIN diodes fabricated by the state-of-the-art silicon technology, is analized for the phase shifter use in terms of the punch-through voltage, the junction capacitance, and the forward bias current. Proper diode design for low DC power requirement is found to design the punch-through voltage of
Naohisa GOTO Fumio WATANABE Toshio SEKIGUCHI
This paper deals with a problem of maximizing directivity of a uniformly spaced broadside array under constraints on the specified sidelobe level. For this purpose, we use a quadratic programming in order to clarify the properties of the radiation pattern with high directivity and low sidelobe level. In resulting radiation patterns, the first sidelobes are suppressed to the specified level and other sidelobes decrease gradually in magnitude similarly to a Taylor pattern. The number of sidelobes in equal magnitude is determined by the specified sidelobe level. These properties are still held for both isotropic and parallel dipole elements.
This article gives the realization of two different types of floating inductance with active transformer used in Jaumann type all-pass networks, and some examples of its applications concerning Biquad all-pass networks.
Hiroyuki IKEDA Moritoshi ANDO Takefumi INAGAKI
Advanced laser beam scanning pattern, termed the