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    Ferroelectric modulator
    1.
    发明授权
    Ferroelectric modulator 有权
    铁电调制器

    公开(公告)号：US06518850B1

    公开(公告)日：2003-02-11

    申请号：US09510769

    申请日：2000-02-23

    Applicant: Kent Olof Falk ,  Ragnar Arvidsson

    Inventor： Kent Olof Falk ,  Ragnar Arvidsson

    IPC: H03C300

    CPC classification number: H01Q3/44 ,  H03C7/022

    Abstract: A method of modulating a microwave carrier and a modulating device are disclosed make it possible directly, onto a microwave carrier right at the operating frequency, to modulate an information signal from a digital bit-stream without the use of a conventional up-conversion chain or frequency multiplication after the modulation. A fast ferroelectric element is provided and operated with a variable voltage source controlled directly by the digital bit-stream representing the information to be modulated. The element can either be positioned between a microwave power amplifier and a radiating antenna device or even close in front of the antenna such that a collimated beam must pass through the modulation device. The element will then be able to introduce phase modulation of a passing microwave carrier.

    Abstract translation: 公开了一种调制微波载波和调制装置的方法，可以直接在工作频率的微波载波上直接调制来自数字比特流的信息信号，而不需要使用传统的上变频链，或者 调制后的倍频。 提供快速铁电元件并用可变电压源操作，该可变电压源由数字位流直接控制，表示要调制的信息。 该元件可以位于微波功率放大器和辐射天线装置之间，或者甚至靠近天线前方，使得准直束必须通过调制装置。 该元件将能够引入通过的微波载波的相位调制。

    F. m. transmitter employing magnetically modulated ferrimagnetic resonator
    2.
    发明授权
    F. m. transmitter employing magnetically modulated ferrimagnetic resonator 失效
    使用磁力调制的非线性谐振器

    公开(公告)号：US3787772A

    公开(公告)日：1974-01-22

    申请号：US3787772D

    申请日：1972-06-05

    Applicant: RYKA SCIENT INC

    Inventor： SEDIN J

    IPC: H03C3/09 ,  H03C7/02 ,  H04B1/04

    CPC classification number: H03C3/09 ,  H03C7/022

    Abstract: A ferrimagnetic crystal resonator is employed as the frequency determinative element of a radio frequency oscillator. The ferrimagnetic crystal is disposed in the gap of a magnet and the magnetic field is modulated in intensity in accordance with an audio AM signal to be impressed on the carrier. The audio AM modulation of the magnetic field of the magnet is converted into frequency modulation of the carrier frequency of the ferrimagnetic crystal controlled oscillator. An internally generated stable reference radio frequency signal is compared with a sample of the FM output signal to produce an error signal for correcting the average magnetic field intensity for controlling the average or carrier frequency of the FM transmitter.

    Abstract translation: 采用亚铁磁晶体谐振器作为射频振荡器的频率确定元件。 亚铁磁晶体设置在磁体的间隙中，并且磁场根据要载入载体上的音频AM信号的强度进行调制。 将磁体的磁场的音频AM调制转换为亚铁磁晶体控制振荡器的载波频率的频率调制。 将内部产生的稳定参考射频信号与FM输出信号的采样进行比较，以产生用于校正平均磁场强度以用于控制FM发射机的平均或载波频率的误差信号。

    System with magnetic film for reducing passive intermodulation
    9.
    发明授权
    System with magnetic film for reducing passive intermodulation 有权

    公开(公告)号：US11848471B2

    公开(公告)日：2023-12-19

    申请号：US18245240

    申请日：2021-09-10

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： Charles L. Bruzzone ,  Jeffrey A. Tostenrude ,  Zohaib Hameed ,  Jeffrey D Keeney

    IPC: H01Q1/00 ,  H01Q19/08 ,  H04B3/52 ,  H01P1/04 ,  H01P1/23 ,  H04B1/04 ,  H03C7/02

    CPC classification number: H01P1/23 ,  H01Q1/002 ,  H03C7/022 ,  H04B1/0475

    Abstract: A wireless communication system includes a transmitter configured to transmit at least first and second radio waves having respective different frequencies F1 and F2, an electrically conductive first passive substantially linear medium, an electrically conductive first passive substantially nonlinear medium disposed proximate the first passive substantially linear medium, and a first magnetic film covering at least a portion of the first passive substantially linear medium. When the transmitter transmits the first and second radio waves, the first passive substantially linear and nonlinear media receive the first and second radio waves and generate first and second signals propagating therein at the respective frequencies F1 and F2. At least one intermodulation signal having a frequency F3 equal to nF1+mF2, where m and n positive or negative integers, is generated in the first passive substantially nonlinear medium. The first magnetic film reduces the at least one intermodulation signal by at least 2 dB.

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