Automated multi-band tuning probe system
View Patent ↗Multi-band remotely configurable tuning probes for slide screw impedance tuners allow instantaneous larger frequency coverage beyond the capacity of existing tuning probes using the single horizontal and vertical axis mechanism of a prior art single probe, single band tuner. This is done by carving multiple slugs of different length and frequency coverage as segments of a disc-shaped revolving slab, which rotates inside the legs of a captive unit and locks at distinct angles. The captive unit is attached to the vertical control mechanism of the tuner and rotation is ensured using multiple traverse lateral studs on the disc unit and a set of vertical studs on the slabline close to the idle port of the tuner. An automated procedure ensures remote switching between tuning slugs. Calibration and tuning is as in prior art single probe tuners.
1 . An automatically configurable multi-band tuning probe system for load pull tuner,
wherein
the load pull tuner comprises a slabline with two parallel conductive sidewalls and a cylindrical center conductor linking two ports, a test port, and an idle port, and at least one remotely controlled mobile carriage, moving along the slabline, and including a single, remotely controlled, perpendicular to the slabline vertical axis mechanism which holds and controls a remotely configurable multi-band tuning probe assembly;
and wherein
the remotely configurable multi-band tuning probe assembly comprises:
a) a configurable tuning probe linked to the vertical axis mechanism and two components:
a1) a saddle device, which is connected to the vertical axis and has two legs forming a bridge across a channel along the slabline, and
a2) a disc-shaped slab with a thickness, a front, and a back surface, divided in a multitude of angular segments forming tuning slugs and rotating between the legs of the bridge parallel to the slabline, insertable and slidably-fitting between the sidewalls of the slabline and lockable at distinct rotation angles using an interlock mechanism and
b) means for remotely controlling the rotation and locking angles of the disc-shaped slab using an unmovable control device and an automated configuration procedure.
2 . The automatically configurable multi-band tuning probe system of claim 1
wherein
the tuning slugs formed by the angular segments of the rotating disc-shaped slab have concave peripheral extremity mirroring the center conductor and covering different frequency bands each.
3 . The automatically configurable multi-band tuning probe system of claim 2
wherein
the angles of the segments are selected to create tuning slugs, each slug covering a frequency band; the said tuning bands being adjacent, covering a totality of frequencies from a minimum frequency to a maximum frequency, the smallest segment angle creating a highest frequency band and the largest segment angle creating a lowest frequency band.
4 . The automatically configurable multi-band tuning probe system of claim 1 ,
wherein
the disc-shaped slab has a multitude of stud sets placed concentrically traversing and protruding from the front and back surface,
and a set of two vertical studs mounted symmetrically across each-other on top of the walls of the slabline close to the idle port;
and wherein
the disc-shaped slab rotates sliding between the legs of the bridge and is lockable, using the interlock mechanism, at several angles associated with orientation of the segments versus the slabline.
5 . The automatically configurable multi-band tuning probe system of claim 4 ,
wherein
the set of two vertical studs on top of the sidewalls of the slabline are mounted at a distance across each other more than the thickness of the disc-shaped slab and less than the said thickness plus the protrusion of the studs traversing the disc-shaped slab.
6 . The automatically configurable multi-band tuning probe system of claim 5 comprises the following steps:
a) lift the vertical axis mechanism to a highest position;
b) move the at least one remotely controlled carriage towards the idle port associated with the set of two vertical studs on the slabline;
c) lower the vertical axis mechanism until the multitude of studs sets on the disc-shaped slab are below the set of two vertical studs on the slabline;
d) move the at least one remotely controlled carriage towards the test port or the idle port to rotate the disc-shaped slab, switch and lock at the next frequency band;
e) if the frequency band locked in step d) is the desired one, go to step g);
f) if the frequency band locked in step d) is not the desired one lift the vertical axis mechanism to the highest position, move the at least one remotely controlled carriage back and go to step c);
g) lift the vertical axis mechanism to the highest position and initialize the load pull tuner.
7 . The automatically configurable multi-band tuning probe system of claim 6 ,
wherein
after the automated configuration procedure, the disc-shaped slab remains locked against the legs of the bridge while the at least one remotely controlled mobile carriage and the vertical axis mechanism move horizontally and vertically.
8 . The automatically configurable multi-band tuning probe system of claim 1 or 4 employing a set of troughs on the front and back surfaces of the disc-shaped slab and associated spring-loaded steel balls installed on both legs of the bridge and protruding inwards facing the disc-shaped slab, mirroring, when aligned, the set of troughs;
wherein
when aligned, the steel balls drop into the troughs and lock the disc-shaped slab at a certain angle and secure the orientation of the segment.
9 . The automatically configurable multi-band tuning probe system of claim 1 ,
wherein
the vertical axis mechanism and the horizontal position of the at least one remotely controlled mobile carriage of the load pull tuner are remotely controlled using stepper motors and gear.