Field of the Invention
The present invention relates to Base Station Antenna (BSA) systems and more particularly relates to the pantograph mechanism for linear integrated Phase Shifter (PS) assembly for providing the output in linear straight-line motion.
Background and prior art of the Invention
Phase shifters generally fall into two categories: analog phase shifters and digital phase shifters. Analog phase shifters allow for a continuously variable phase but are typically susceptible to noise. Digital phase shifters are typically less susceptible to noise than their analog counterparts but only allow for discrete phase shifts. For example, a digital phase shifter may only allow for phase shifts in forty-five- degree increments. The existing mechanical drive system for the phase shifter module has several components in a single-stage assembly. The cost of the components is high and so there is a requirement to develop a cost-effective linear drive model. The duration of the integration is also higher because of the complexity and it consumes high assembly time and operator skills. The analog phase shifter can be in two major categories. One is changing transmission median density using the various dielectric material, in this case, the electrical length between input and output get changed and the physical length remains the same. Another the physical length itself can be changed & achieved in the required phase as desired.
Also the document “Linear phase shifter modeling and simulation: confirmation of experimental characterization” by M. Ould-Elhassen, M. Mabrouk, A. Ghazel discloses the electrical modeling and simulation of linear analog phase shifter from DC to 1.2GHz. The obtained phase shifting is linearly growing from 0 to 800 degrees. The patent document CN102509816 discloses a switch linear phase shifter based on a micro electro mechanical system (MEMS) capacitance and inductance phase shifting unit, which comprises MEMS switches, a T-shaped node, a reference phase shifting coplanar waveguide transmission line, an MEMS capacitance and inductance phase shifting transmission line, a transmission line right-angled corner, an MEMS switch electrode, a lead wire, an isolating resistor and a medium substrate. The reference

phase shifting coplanar waveguide transmission line and the phase shifting transmission line embedded into an MEMS capacitor and inductor form two transmission paths of the switch linear phase shifter, the MEMS switches are arranged on the T-shaped node and used for strobing the two transmission paths, and the transmission line right-angled corner is used for connecting two sections of transmission lines perpendicular to each other. The switch linear phase shifter based on the MEMS capacitance and inductance phase shifting unit has the advantages that a phase delay unit formed by the MEMS capacitor and inductor effectively reduces integral size of the phase shifter, and a small-sized multi-digit switch linear phase shifter based on the MEMS capacitance and inductance phase shifting unit can be obtained by connecting a plurality of switch linear phase shifters based on the MEMS capacitance and inductance phase shifting unit in cascading mode.
But the present invention is unique and provides a completely novel solution for solving the problems in the base station array antenna applications prior to art documents.
Summary of the Invention
A drive using pantograph mechanism for linear Integrated phase shifter for array antennas comprises a bottom carrier for withstanding the linear integrated phase shifter and upright vertical engagers positioned at the circumference and downward engagers adjacent to the vertical engagers; a base plate with a narrow aperture extending along the width etched at one extreme right end and vertical studs with locking means wherein the said two vertical studs are at right angle to the third stud for accommodating the subsequent layer and being positioned on the said carrier; a long and narrow input mechanical drive arm / rod to be glidingly positioned along the narrow etched aperture in the base plate; a top cover with vertical locking means for sleekly fitting with the corresponding said vertical studs of the base plate for providing a complete cover of the phase shifter; an input link cover to be positioned adjacent to the said top cover and enclosing the input mechanical drive arm / rod through the hollow region; in that four bar - input link locking pins for fixedly positioning and rigidly holding the said top. cover and the link cover on the top surface of the base plate through the holders, input link and mechanical input drive arm / rod altogether locked by locking pin with engagers, PCB and carrier locking means and locking plate with

multiple circular holes arranged along the entire surface with circular locks pins were arranged in rows and column for locking the carrier with the P.S PCB.
Object of the Invention
It is a primary objective of the present invention to provide a pantograph mechanism to drive linear integrated phase shifters to achieve the variable linear phase for the desired linear input movement for Base Station (BS) array systems.
It is a secondary object of the present invention to provide a mechanical drive system for the phase shifter modules incorporating minimum components and is also cost-effective.
It is a tertiary object of the present invention to provide a linear drive link mechanism that is derived from a four-bar pantograph mechanism or four-bar mechanism wherein the said mechanism is used to scale up or scale down the motion in a single plane and it may be a circular or straight line or splined motion.
It is a fourth object of the present invention to provide a device that converts the motion, for example, 50 mm straight-line motion of the tilt rod to the 22 mm, 20 mm, 13 mm, 10 mm, and 7 mm as shown in Fig. 1
It is a fifth object of the present invention to provide a device that is cost- effective with reduced weight and complexity, easy to handle with minimum form factor, has reduced time for the assembly, and has minimum inventory cost.
It is a sixth object of the present invention to provide a device that comprises a bottom carrier for withstanding the linear integrated phase shifter and upright vertical engagers positioned at the circumference and downward engagers adjacent to the vertical engagers.
It is a seventh object of the present invention to provide a device including a base plate with a narrow aperture extending along the width etched at one extreme right end and vertical studs with locking mean wherein the said two vertical studs are at a right angle to the third stud for accommodating the subsequent layer and being positioned on the said carrier.
It is an eighth object of the present invention to provide a device comprising a ' long and narrow mechanical input drive arm/rod to be glidingly positioned along with the narrow etched aperture in the base plate.
It is a ninth object of the present invention to provide a device having a top cover with vertical locking means for sleekly fitting with the corresponding said vertical studs of the base plate for providing complete coverage of the mechanism

It is a tenth object of the present invention to provide a device with an input link cover to be positioned adjacent to the said top cover and enclosing the input mechanical drive arm/rod through the hollow region.
It is an eleventh object of the present invention to provide a device including four bar-input link with mechanical input drive arm/rod for altogether locked by locking pin with downward engagers
It is the twelfth object of the present invention to provide a device including four bar input link locking pins for fixedly positioning and rigidly holding the said top cover and the link cover on the top surface of the base plate through the holders and locking means.
It is a thirteenth object of the present invention to provide a device comprising a locking plate with multiple circular holes arranged along the entire surface with circular locks pins were arranged in rows and columns for locking the carrier with the P.S PCB.
It is a final object of the present invention to provide an array antenna of desired properties.
Statement of the invention
1) A pantograph mechanism drive for linear integrated phase shifter comprises
i) A bottom carrier for withstanding the linear integrated phase shifter and upright vertical engagers positioned at the circumference and downward engagers adjacent to the vertical engagers.
ii) A base plate with a narrow aperture extending along the width etched at one extreme right end and vertical studs with locking means wherein the said two vertical studs are at a right angle to the third stud for accommodating the subsequent layer and being positioned on the said carrier.
iii) A long and narrow input mechanical drive arm/rod to be glidingly positioned along with the narrow etched aperture in the base plate.
iv) A top cover with vertical locking means for sleekly fitting with the corresponding said vertical studs of the base plate for providing complete coverage of the Pantograph drive.
v) An input link cover to be positioned adjacent to the said top cover and enclosing the input mechanical drive arm/ rod through the hollow region.

vi) In that four bar-input link with mechanical input drive arm/rod altogether locked by locking pin with downward engagers
vii) At least four bar-input link locking pins for fixedly positioning and rigidly holding the said top cover and the link cover on the top surface of the base plate through the holders and locking means.
viii) Locking plate with multiple circular holes arranged along the entire surface with circular lock pins arranged in rows and columns for locking the carrier with the P.S PCB.
Brief description of the drawings
Fig. 1 illustration of example link creation
Fig.2 Block diagram of the proposed system
Fig.3 Pantograph mechanism with single covered assembly
Fig.4 Input and output movements of the proposed module
A detailed description of the drawings
The foregoing has broadly outlined the features and technical advantages of the present disclosure in order that the detailed description of the disclosure that follows may be better understood. Additional features and advantages of the disclosure will be described hereinafter which form the subject of the claims of the disclosure. It should be appreciated by those skilled in the art that the conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. It should also be realized by those skilled in the art that such equivalent constructions do not depart from the spirit and scope of the disclosure as set forth in the appended claims. The novel features which are believed to be characteristic of the disclosure, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures. It is to be expressly understood, however, that each of the figures is provided for the purpose of illustration and description only and is not intended as a definition of the limits of the present disclosure.

The terms "an embodiment", "embodiment", "embodiments", "the embodiment", "the embodiments", "one or more embodiments", "some embodiments", and "one embodiment" mean "one or more (but not all) embodiments of the invention(s)" unless expressly specified otherwise. The terms "including", "comprising", “having" and variations thereof mean "including but not limited to" unless expressly specified otherwise. The enumerated listing of items does not imply that any or all the items are mutually exclusive unless expressly specified otherwise. The terms "a", "an" and "the" mean "one or more" unless expressly specified otherwise. A description of an embodiment with several components in communication with each other does not imply that all such components are required. On the contrary, a variety of optional components are described to illustrate the wide variety of possible embodiments of the invention. When a single device or article is described herein, it will be clear that more than one device/article (whether they cooperate) may be used in place of a single device/article.
The examples set forth below represent the necessary information to enable those skilled in the art to practice the invention and illustrate the best mode of practicing the invention. Upon reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the invention and will recognize applications of these concepts not particularly addressed herein. It should be understood that these concepts and applications fall within the scope of the disclosure, drawings, and accompanying claims.
Similarly, where more than one device or article is described herein (whether they cooperate), it will be clear that a single device/article may be used in place of the more than one device or article or a different number of devices/articles may be used instead of the shown number of devices or programs. The functionality and/or the features of a device may be alternatively embodied by one or more other devices which are not explicitly described as having such functionality/features. Thus, other embodiments of the invention need not include the device itself.
Finally, the language used in the specification has been principally selected for readability and instructional purposes, and it may not have been selected to delineate or circumscribe the inventive subject matter. It is therefore intended that the scope of

the invention be limited not by this detailed description, but rather by any claims that issue on an application based here on. Accordingly, the embodiments of the present invention are intended to be illustrative, but not limiting, of the scope of the invention, which is set forth in the following claims. While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
Fig. 3 and Fig.4 illustrates the single and full assembly view of the linear drive link mechanism in multiple views. A phantograph mechanism to drive linear integrated phase shifter for BS array comprises a bottom carrier for withstanding the linear phase shifter and upright vertical engagers positioned at the circumference and four downward engagers adjacent to the vertical engagers; a base plate with a narrow aperture extending along the width etched at one extreme right end and vertical studs with locking means wherein the said two vertical studs are at right angle to the third stud for accommodating the subsequent layer and being positioned on the said carrier; a long and narrow input mechanical drive arm/ rod to be glidingly positioned along the narrow etched aperture in the base plate; a top cover with three vertical locking means for sleekly fitting with the corresponding said vertical studs of the base plate for providing a complete cover of the phase shifter; an input link cover to be positioned adjacent to the said top cover and enclosing the input drive arm/ rod through the hollow region; four bar - input link locking pins for fixedly positioning and rigidly holding the said top cover and the link cover on the top surface of the base plate through the holders and locking means and locking plate with multiple circular holes arranged along the entire surface with circular lock pins arranged in rows and columns for locking the carrier with the P.S PCB.
The pantograph mechanism to drive the linear integrated phase shifter for base station antenna array as illustrated in fig. 1 and 2 wherein locking pins are utilized in the said system for providing a fixed locking functionality along with the connection pins and the said device converts the X mm straight-line motion of the tilt rod to the X1 mm, X2 mm, X3 mm, X4 mm, and Xn mm. Further, the mechanical drive linear integrated phase shifter for the BSA array produces reduced output in linear straight- line motion by the utilization of the four-bar phantom graph.

Example: 50mm straight-line motion from input drive arm/rod (mechanical tilt rod) covert as 7mm, 10mm, 13mm & 22mm of straight-line motion.
The pantograph mechanism to drive the linear integrated phase shifter for the base station antenna array is illustrated in figs. 1 and 2 wherein the locking plate is sandwiched between the bottom carrier and the intermediate base plate for providing a rigid contact between the said base plate and carrier and the four-bar input link locking pins provide a linear motion to the input drive arm/ rod.
The corresponding structures, materials, acts, and equivalents of all means or step plus function elements in the claims below are intended to include any structure, material, or act for performing the function in combination with other claimed elements as specifically claimed. The description of the present invention has been presented for purposes of illustration and description but is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art based upon the teachings herein without departing from the scope and spirit of the invention. The subject matter was described to explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

We Claim
1) A drive using pantograph mechanism for linear integrated phase shifter for BSA array comprises
i) A bottom carrier for withstanding the linear integrated phase shifter and upright vertical engagers positioned at the circumference and downward engagers adjacent to the vertical engagers.
ii) A base plate with a narrow aperture extending along the width etched at one extreme right end and vertical studs with locking means wherein the said two vertical studs are at a right angle to the third stud for accommodating the subsequent layer and being positioned on the said carrier.
iii) A long and narrow input mechanical drive arm/ rod to be glidingly positioned along with the narrow etched aperture in the base plate.
iv) A top cover with vertical locking means for sleekly fitting with the corresponding said vertical studs of the base plate for providing complete coverage of the phase shifter.
v) An input link cover to be positioned adjacent to the said top cover and enclosing the input drive arm/ rod through the hollow region.
vi) At least four bar-input link locking pins for fixedly positioning and rigidly holding the said top cover and the link cover on the top surface of the base plate through the holders and locking means.
vii) In that four bar-input link with mechanical input drive arm/rod altogether locked by locking pin with downward engagers
viii) Locking plate with multiple circular holes arranged along the entire surface with circular lock pins arranged in rows and columns for locking the carrier with the P.S PCB.
2) The pantograph mechanism to drive linear integrated phase shifter for BS array as claimed in claim 1 wherein at least four locking pins are utilized in the said system for providing a fixed locking functionality along with the connection pins.
3) The pantograph mechanism to drive linear integrated phase shifter for BS array as claimed in claim 1 wherein the said device converts the X mm straight-line motion of the tilt rod to the X1 mm, X2 mm, X3 mm, X4 mm and Xn mm (for

example 50 mm straight-line motion of the tilt rod to the 22 mm, 20 mm, 13 mm, 10 mm, and 7 mm.)
4) The pantograph mechanism to drive linear integrated phase shifter for BS array as claimed in claim 1 wherein the said device produces reduced output in linear straight-line motion by the utilization of the four-bar phantom graph.
5) The pantograph mechanism to drive linear integrated phase shifter for BS array as claimed in claim 1 wherein the locking plate is sandwiched between the bottom carrier and the intermediate base plate for providing a rigid contact between the said base plate and carrier.
6) The pantograph mechanism to drive linear integrated phase shifter for BS array as claimed in claim 1 wherein four-bar input link locking pins provide a linear motion to the input drive arm/ rod.