Patents by Inventor Ajay Kumar Poddar
Ajay Kumar Poddar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9923257Abstract: The present disclosure is directed to a balun circuit adapted to operate at a frequency of between about 5 GHz to about 110 GHz. The balun circuit includes first and second output striplines and an input stripline formed on a first surface of the substrate, and a slotline formed on a second surface of the substrate opposite the first surface. The slotline has first and second ends, the first end overlapping the first output stripline and the second end overlapping the second output stripline, and the input stripline overlapping the slotline midway between the first end and the second end.Type: GrantFiled: April 7, 2015Date of Patent: March 20, 2018Assignee: Synergy Microwave CorporationInventors: Ajay Kumar Poddar, Ulrich Rohde, Shiban K. Koul
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Publication number: 20170187086Abstract: The present disclosure provides for a phase shifter having at least one phase shift section. The phase shift section includes an input port for receiving an incoming radio frequency signal, an output port for transmitting an outgoing radio frequency signal, an input junction coupled to the input port, an output junction coupled to the output port, and a plurality of transmission lines. The input junction includes a first plurality of cantilever type switches, and the output junction includes a second plurality of cantilever type switches. Each transmission line connects one of the first plurality of cantilever type switches to a corresponding one of the second plurality of cantilever type switches. The first plurality of cantilever type switches, the second plurality of cantilever type switches, and the plurality of transmission lines are formed in a coplanar waveguide.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Applicant: Synergy Microwave CorporationInventors: Shiban K. Koul, Ajay Kumar Poddar, Sukomal Dey, Ulrich L. Rohde
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Publication number: 20170186578Abstract: The present disclosure provides for a microelectromechanical switch including a first port (e.g., input port), one or more second ports (e.g., output ports), a cantilever beam, and a mechanical spring connected to the cantilever beam for providing a mechanical force to move the cantilever beam. The cantilever beam extends from a first end, which is in contact with either the first port or one of the second ports, to a second end that is switchably connectable to the other of the first port or said one of the second ports. The first and second ports and cantilever beam may be formed in a coplanar waveguide.Type: ApplicationFiled: December 27, 2016Publication date: June 29, 2017Applicant: Synergy Microwave CorporationInventors: Shiban K. Koul, Ajay Kumar Poddar, Sukomal Dey, Ulrich L. Rohde
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Patent number: 9608564Abstract: The present disclosure is directed a metamaterial circuit may further be coupled to a möbius strip resonator or a substrate integrated waveguide. The disclosure is also directed to a device having a tuning circuit and a metamaterial resonator operatively coupled to the tuning circuit. The metamaterial resonator operatively coupled to the tuning circuit may likewise be coupled to a möbius strip resonator or a substrate integrated waveguide.Type: GrantFiled: April 7, 2015Date of Patent: March 28, 2017Assignee: Synergy Microwave CorporationInventors: Ajay Kumar Poddar, Ulrich L. Rohde
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Publication number: 20150303870Abstract: The present disclosure is directed a metamaterial circuit may further be coupled to a möbius strip resonator or a substrate integrated waveguide. The disclosure is also directed to a device having a tuning circuit and a metamaterial resonator operatively coupled to the tuning circuit. The metamaterial resonator operatively coupled to the tuning circuit may likewise be coupled to a möbius strip resonator or a substrate integrated waveguide.Type: ApplicationFiled: April 7, 2015Publication date: October 22, 2015Applicant: SYNERGY MICROWAVE CORPORATIONInventors: Ajay Kumar Poddar, Ulrich L. Rohde
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Publication number: 20150288344Abstract: The present disclosure is directed to a balun circuit adapted to operate at a frequency of between about 5 GHz to about 110 GHz. The balun circuit includes first and second output striplines and an input stripline formed on a first surface of the substrate, and a slotline formed on a second surface of the substrate opposite the first surface. The slotline has first and second ends, the first end overlapping the first output stripline and the second end overlapping the second output stripline, and the input stripline overlapping the slotline midway between the first end and the second end.Type: ApplicationFiled: April 7, 2015Publication date: October 8, 2015Applicant: Synergy Microwave CorporationInventors: Ajay Kumar Poddar, Ulrich Rohde, Shiban K. Koul
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Patent number: 9094133Abstract: The present invention details fabrication guidelines of integrated optoelectronic oscillators with frequency and phase stability, having higher frequency selectivity in a relatively small size (compared to the larger size of a higher order electrically realized RF filter), reduced temperature sensitivity, and minimized frequency drift. The integrated photonic components and RF oscillator may use Silicon photonics and microelectronic integration using CMOS and BiCMOS technology, eliminating the need for bulky and/or discrete optical and microwave components.Type: GrantFiled: March 12, 2013Date of Patent: July 28, 2015Assignee: Synergy Microwave CorporationInventors: Ajay Kumar Poddar, Ulrich L. Rohde, Afshin S. Daryoush
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Patent number: 9088369Abstract: Aspects of the disclosure relate generally to a circuit for sustaining an radio frequency (RF) modulated optical signal. The circuit may comprise a self injection locking component having a fiber optic delay line over which a portion of the optical signal propagates. The circuit may also comprise a self phase locked loop component having at least two fiber optic cables having different lengths and over which another portion of the optical signal propagates and a phase detector coupled to the at least two fiber optic cables and configured to determine a phase difference between the signals propagating over one of the respective fiber optic cables. The circuit may further comprise a voltage controlled oscillator configured to generate a stable oscillating signal in response to signals generated by each of the self injection locking and self phase locked loop components, the stable oscillating signal being configured to sustain the optical signal.Type: GrantFiled: February 6, 2013Date of Patent: July 21, 2015Assignee: Synergy Microwave CorporationInventors: Ajay Kumar Poddar, Ulrich L. Rohde, Afshin S. Daryoush
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Patent number: 7636021Abstract: A voltage controlled oscillator compising a distributed coupled resonator (DCR) that desirably produces a low noise signal source with reduced phase hits in comparison to a high Q resonator, such as a ceramic and SAW (Surface Acoustic Wave) resonator based oscillator.Type: GrantFiled: May 19, 2006Date of Patent: December 22, 2009Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar, Klaus Juergen Schoepf, Reimund Rebel, Hua Zhang
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Patent number: 7612296Abstract: A printed circuit board having one or more vias disposed in the surface area of a pad. The pad may serve as a connection point between the printed circuit board and another circuit board and is disposed along the edge of the board such that the vias do not form half vias.Type: GrantFiled: August 31, 2005Date of Patent: November 3, 2009Assignee: Synergy Microwave CorporationInventors: Meta Rohde, Ajay Kumar Poddar, Klaus Juergen Schoepf, Reimund Rebel
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Patent number: 7605670Abstract: An aspect of the present invention is a voltage controlled oscillator that provides multi octave band tenability. The oscillator preferably includes one or more multi planar resonators which allow it to be implemented in integrated circuit form. Oscillators implemented in accordance with the aspect of the present invention provide as wide a tuning range as the YIG based resonators but are much more compact and efficient. Therefore, they are amenable to implementation in integrated circuits and suited for adaptation in third and future generation wireless devices.Type: GrantFiled: November 15, 2006Date of Patent: October 20, 2009Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar, Klaus Juergen Schoepf, Parimal Patel
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Patent number: 7586381Abstract: A tunable oscillator includes a first transistor, a second transistor connected in parallel with the first transistor, a noise feedback and bias network coupled to the first and second transistors, a planar coupled resonator network coupled to the transistors and a means for dynamically tuning the resonant frequency of the planar coupled network and the junction capacitance of the transistors.Type: GrantFiled: November 2, 2006Date of Patent: September 8, 2009Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar, Klaus Juergen Schoepf, Parimal Patel
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Patent number: 7580693Abstract: In one aspect, a mixer that provides improved isolation between an input oscillator and a mixing cell. In another aspect, a mixer that includes circuitry operative to shape an input signal provided by a local oscillator.Type: GrantFiled: October 27, 2005Date of Patent: August 25, 2009Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Antonio Almeida, Ajay Kumar Poddar, Vaseem Ahmed, Nikolay Ilkov, Klaus Juergen Schoepf
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Patent number: 7545229Abstract: An oscillator comprising a three-terminal device and circuitry coupled across a first terminal and a second terminal of the device. The circuitry is preferably operable to bias the device and feedback a select amount of noise generated by the device into the device so as to reduce a proportional amount of phase noise present at a third terminal of the device.Type: GrantFiled: January 24, 2007Date of Patent: June 9, 2009Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar
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Patent number: 7365612Abstract: An oscillator comprising an active device having first, second and third terminals, a plurality of micro-stripline resonators coupled together to form a coupled-resonator network, the coupled-resonator network being coupled to the second terminal of the active device and a tuning network coupled to the coupled-resonator network, the tuning network being operable to adjust the coupling between at least two of the resonators that form the coupled resonator network.Type: GrantFiled: August 16, 2005Date of Patent: April 29, 2008Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar, Reimund Rebel, Parimal Patel, Klaus Juergen Schoepf
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Patent number: 7292113Abstract: In one aspect, a voltage controlled oscillator is provided that includes circuitry comprising tunable coupled resonator networks, which are coupled to a terminal of a pair of three-terminal devices through a tuning voltage network which supports wide-band tunability. In another aspect, a wide-band tunable resonator is provided that is amenable to integration in the integrated circuit form.Type: GrantFiled: September 9, 2004Date of Patent: November 6, 2007Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar
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Patent number: 7265642Abstract: A voltage controlled oscillator that includes a slot-cut-microstrip-line coupled between a resonator, a tuning diode network and an active device and being operable to act as a common-coupling capacitor between the resonator, the tuning diode network and the active device.Type: GrantFiled: December 9, 2004Date of Patent: September 4, 2007Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar, Parimal Patel
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Patent number: 7262670Abstract: An oscillator comprising a cascode configured device having first, second and third terminals, a plurality of resonators and first circuitry coupled between the plurality of resonators and the second terminal of the cascode configured device. The first circuitry is preferably operable as an evanescent mode buffer to compensate for changes in the capacitance of the oscillator during operation.Type: GrantFiled: July 19, 2005Date of Patent: August 28, 2007Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar, Parimal Patel, Daniel Badea, Klaus Juergen Schoepf
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Patent number: 7196591Abstract: An oscillator comprising a three-terminal device and circuitry coupled across a first terminal and a second terminal of the device. The circuitry is preferably operable to bias the device and feedback a select amount of noise generated by the device into the device so as to reduce a proportional amount of phase noise present at a third terminal of the device.Type: GrantFiled: August 5, 2004Date of Patent: March 27, 2007Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Ajay Kumar Poddar
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Patent number: 7180381Abstract: In one aspect, the present invention includes a voltage controlled oscillator comprising an active device having a plurality of resonators coupled across two terminals of the device and at least one resonator coupled across the plurality of resonators. The at least one resonator preferably operates as an evanescent mode buffer capable of storing a select amount of energy present in the oscillator.Type: GrantFiled: April 21, 2005Date of Patent: February 20, 2007Assignee: Synergy Microwave CorporationInventors: Ulrich L. Rohde, Reimund Rebel, Ajay Kumar Poddar