公开(公告)号：US09843086B1

公开(公告)日：2017-12-12

申请号：US15445629

申请日：2017-02-28

Applicant: MICRO LAMBDA WIRELESS, INC.

Inventor： Oleksandr Chenakin

IPC: H03B5/30 ,  H01P7/00 ,  H03B5/10 ,  H03B5/18

CPC classification number: H03B5/1852 ,  H03B5/10 ,  H03B5/1847 ,  H03B5/1882 ,  H03B5/30

Abstract: An apparatus and method for building and operating of a YIG-based filter-attenuator module with closed-loop control. The module combines both signal filtering and amplitude control functions by utilizing an yttrium-iron-garnet (YIG) resonator. A technique for a closed-loop calibration and control also disclosed. This apparatus and method provides a cost effective harmonic rejection/amplitude control solution for microwave test-and-measurement instruments such as signal generators and spectrum analyzers.

公开(公告)号：US09819308B1

公开(公告)日：2017-11-14

申请号：US15420048

申请日：2017-01-30

Applicant: MICRO LAMBDA WIRELESS, INC.

Inventor： Oleksandr Chenakin

IPC: H03K3/03 ,  H03B5/18 ,  H01P1/218 ,  H01P1/20 ,  H01P7/00

CPC classification number: H03B5/1882 ,  H01P1/20 ,  H01P1/218 ,  H01P7/00 ,  H03B5/18 ,  H03B5/1894 ,  H03B2201/0241 ,  H03B2201/035

Abstract: A dual-resonator YIG oscillator with a main YIG resonator and a stabilizing YIG resonator both suspended in a common magnetic field. The main YIG resonator takes on the high-Q factor aspects of the oscillator, while the stabilizing YIG resonator helps stabilize the operation of the main YIG resonator, and also allows the main YIG resonator operate at higher magnetic field strengths, achieving higher frequency operation. The stabilizing YIG resonator also enables the oscillator's active device to operate in a more linear, lower phase noise, regime. As compared to conventional YIG oscillators, the disclosed dual resonator YIG oscillator provides significant performance improvements, such as higher frequency operation, lower power consumption, higher tuning speed, and lower phase noise.

公开(公告)号：US09793904B1

公开(公告)日：2017-10-17

申请号：US15469434

申请日：2017-03-24

Applicant: MICRO LAMBDA WIRELESS, INC.

Inventor： Oleksandr Chenakin

IPC: H03L7/06 ,  H03L7/087 ,  H03L7/099 ,  H03K5/1252

CPC classification number: H03L7/087 ,  H03K5/1252 ,  H03L7/099 ,  H03L7/18

Abstract: An improved noise-corrected phase-locked loop frequency synthesizer configured to reduce noise, such as phase noise and spurious signals, without the use of switching circuits. The synthesizer uses a phase shifter device configured to accept a noise containing frequency signal from a voltage controlled oscillator (VCO) circuit, such as an integer-N single loop PLL synthesizer, as well as noise reducing control signals from a noise detecting sensor or circuit, and output a noise reduced VCO frequency signal. In some embodiments, the noise reducing sensor may be formed from a second, lower noise, phase locked loop circuit. The frequency synthesizer circuit, noise detecting sensor, and the phase shifter device are configured to all run continuously, with the noise reducing sensor and frequency shifter continually acting to reduce noise, produced by higher noise integer-N PLL frequency synthesizer.