公开(公告)号：US20160315790A1

公开(公告)日：2016-10-27

申请号：US15106159

申请日：2014-12-18

申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

发明人： Mohsen SALEHI ,  Majid MANTEGHI

IPC分类号： H04L15/04 ,  H04B1/04

CPC分类号： H04L15/04 ,  H04B1/04 ,  H04B1/38

摘要： One aspect is a circuit for tuning a resonance frequency of an electrically small antenna and directly exciting the electrically small antenna. The circuit includes a first source configured for providing a constant voltage. The circuit also includes an antenna and a switched capacitor configured for being alternatively alternately coupled to the first source to be charged thereby and to the antenna for exciting the antenna. Another aspect is a transmitter for transmitting a wireless signal using an antenna without using a variable voltage source to excite the antenna. The transmitter includes a first source configured for providing a constant voltage. The transmitter further includes an antenna and a switched capacitor configured for being alternately coupled to the first source to be charged thereby and to the antenna for exciting the antenna and for tuning a resonance frequency of the antenna.

摘要翻译： 一个方面是用于调谐电小天线的谐振频率并直接激励电小天线的电路。 电路包括被配置为提供恒定电压的第一源。 电路还包括天线和开关电容器，其被配置为交替地耦合到第一源以被充电，以及天线用于激励天线。 另一方面是用于使用天线发送无线信号而不使用可变电压源来激发天线的发射机。 发射机包括被配置为提供恒定电压的第一源。 发射机还包括天线和开关电容器，其被配置为交替耦合到第一源以被充电，以及天线用于激励天线并用于调谐天线的谐振频率。

公开(公告)号：US20160294056A1

公开(公告)日：2016-10-06

申请号：US15038394

申请日：2014-11-20

申请人： VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.

发明人： Majid MANTEGHI ,  Mohsen SALEHI

IPC分类号： H01Q3/34 ,  H01Q5/25 ,  H01Q9/04

CPC分类号： H04L27/12 ,  H01Q3/34 ,  H01Q3/44 ,  H01Q5/00 ,  H01Q5/25 ,  H01Q9/0421 ,  H04B1/006 ,  H04B1/04

摘要： A circuit for tuning a resonance frequency of an electrically small antenna. The circuit includes a first source configured for providing a modulation signal, a second source configured for providing a periodic electrical signal, an antenna, and a tuning circuit configured for modulating a resonance frequency of the antenna in response to the modulation signal. The tuning circuit includes first and second capacitors that are alternately coupled to the antenna to change the resonance frequency of the antenna. The capacitor currently coupled to the antenna is decoupled from the antenna and the other capacitor is coupled to the antenna when the voltage across the capacitor currently coupled to the antenna is momentarily zero. In an exemplary embodiment, the tuning circuit comprises first and second inductors rather than capacitors. The inductors are switched into and out of the circuit when the current through the currently coupled inductor is momentarily zero.

摘要翻译： 一种用于调谐电小天线的谐振频率的电路。 该电路包括被配置为提供调制信号的第一源，被配置为提供周期性电信号的第二源，天线以及被配置为响应于调制信号调制天线的谐振频率的调谐电路。 调谐电路包括交替耦合到天线的第一和第二电容器，以改变天线的谐振频率。 当前耦合到天线的电容器当前耦合到天线的电容器上的电压暂时为零时，当前耦合到天线的电容器与天线分离，另一个电容器耦合到天线。 在示例性实施例中，调谐电路包括第一和第二电感器而不是电容器。 当通过当前耦合的电感器的电流瞬时为零时，电感器被切换进出电路。