Loading patent…
OwnerChuck K. Mok, Alain Martin +2inventors
InventorsChuck K. Mok, Alain Martin, Christian Hobden, Yves Patenaude
Estimating the term…
A phase slope equalizer is a recent device used to replace phase shifters in feed networks for satellite communications antennas. The phase slope equalizer has been further refined so that, once manufactured, it does not require tuning and is well suited to integration in larger systems. Three main embodiments are disclosed, one based on a waveguide configuration and the other two on a square coaxial configuration. In the case of the waveguide configuration half wavelength short-circuited stubs spaced by a quarter wavelength are used and in the case of one of the square coaxial configurations half wavelength open-circuited stubs spaced by a quarter wavelength are used. The third embodiment uses quarter wavelength short-circuited stubs spaced by a quarter wavelength.
A phase slope equalizer comprising a rectangular waveguide section containing a resonant circuit which has a substantially constant slope phase shift/frequency response curve extending from a positive phase shift through zero phase shift in the region of the midband frequency to a negative phase shift, the waveguide section comprising a main waveguide and a number of short-circuited stubs in series connection to the main waveguide, the stubs having a nominal length any multiple of half wavelength at midband and the nominal spacing between the stubs being any odd multiple of quarter wavelength at midband.
A phase slope equalizer comprising a rectangular waveguide section containing a resonant circuit which has a substantially constant slope phase shift/frequency response curve extending from a positive phase shift through zero phase shift in the region of the midband frequency to a negative phase shift, the waveguide section comprising a main waveguide and between 2 and 8short-circuited stubs in series connection to the main waveguide, the stubs having a nominal length any multiple of half wavelength at midband and the nominal spacing between the stubs being any odd multiple of quarter wavelength at midband.
A phase slope equalizer containing a resonant circuit which has a substantially constant slope phase shift/frequency response curve extending from a positive phase shift through zero phase shift in the region of the midband frequency to a negative phase shift, the phase slope equalizer being formed as a rectangular coaxial conductor comprising a body portion serving as an outer conductor and having a rectangular channel along which extends coaxially a rectangular main conductor, the body portion also having a rectangular cavity communicating with the channel and receiving in spaced relation to the body one or more rectangular open-circuited stubs in shunt connection to the main conductor, the stubs having a nominal length any multiple of half wavelength at midband and the nominal spacing between the stubs being any odd multiple of quarter wavelength at midband.
A phase slope equalizer containing a resonant circuit which has a substantially constant slope phase shift/frequency response curve extending from a positive phase shift through zero phase shift in the region of the midband frequency to a negative phase shift, the phase slope equalizer being formed as a rectangular coaxial conductor comprising a body portion serving as an outer conductor and having a rectangular channel along which extends coaxially a rectangular main conductor, the body portion also having a rectangular cavity communicating with the channel and receiving in spaced relation to the body one or more rectangular short-circuited stubs in shunt connection to the main conductor, the stubs having a nominal length any odd multiple of quarter wavelength at midband and the nominal spacing between the stubs being any odd multiple of quarter wavelength at midband.
Dependencies are inferred from the claim text.