查询词典 duplexers

This invention discloses a duplexer and a multiplexer of the communication system and a method to realize them on a PCB circuit, which applies a 3db bridge and a low pass filter to constitute a hopstreet duplexer without waste band channels, in which, the signals are shunted and combined by the design of the circuit structure and power distribution of the 3-db bridge and phase offset function, the band filter of the low pass filter and the reflection function of a stopband to make up of a costless duplexer in theory to merge the two channels of different frequencies and reduce loss to increase volume and working bandwidth, then a multiplexer is formed by cascading multiple duplexers.

本发明涉及通信设备，公开了一种通信系统双工器和多工器以及双工多工方法，使得双工器和多工器能够在PCB电路上实现，并且体积小、损耗小、成本低、容量大。本发明中，采用三分贝电桥、低通滤波器构成无损耗频带信道合路的双工器，其中通过电路结构的设计并利用三分贝电桥的功率分配和相位偏移功能将各路信号进行分路和组合，利用低通滤波器的频带滤波和阻带反射功能联合三分贝电桥构造一个理论无耗的双工器，使两路不同频率的信道合路，降低的损耗、提高容量和工作带宽。通过多个上述双工器的级联构成多工器。

Duplexers These products have been widely used in the field of mobile communication.

双工器 以上产品广泛应用于移动通信领域。

Design and simulation results show that these two kinds of 3 dB-couplers are consistent with general requirements of parameter indexes, and can be respectively suitable for narrowband and broadband in the adjacent-channel duplexers.

设计和仿真结果表明，这两种结构的三分贝耦合器符合一般的指标要求，分别适用于窄带和宽带的数字邻频双工器中。

Can develop filters /duplexers or other functional modules independently.

能独立开发滤波器双工器及其他射频前端模块。

According to the requirements of 3 dB-coupler in adjacent-channel duplexers and the basic principles of 3 dB-coupler, a narrow band 3 dB-coupler is analyzed which can applied to digital TV field.

根据数字邻频双工器中对三分贝耦合器的要求和三分贝耦合器的基本原理，对应用于数字电视领域的一款窄带三分贝耦合器进行了分析。

This technology can be employed to create advanced frequency shaping components and devices including filters,duplexers,and resonators for oscillators.

薄膜体声波谐振器采用一种先进的谐振技术，它是通过压电薄膜的逆压电效应将电能量转换成声波而形成谐振，这一谐振技术可以用来制作薄膜频率整形器件等先进元器件。

For instance, it was apparent that new microwave pulse requirements were needed, bringing about the invention of the multi-cavity Magnetron, which in turn required new duplexers and receivers, which then made even higher-frequency magnetrons desirable round and round it went, to the benefit of all radar uses.

例如对微波雷达的需求导致了多腔磁控管的发明，而这又带来了对收发双工机与接收器的需要，反过来又需求更高频率的磁控管…就这样转来转去，雷达因此获益良多。

Apparent that new microwave pulse requirements were needed, bringing about the invention of the multi-cavity Magnetron, whichin turn required new duplexers and receivers, which then made even higher-frequency magnetrons desirable round and round itwent, to the benefit of all radar uses.

例如对微波雷达的需求导致了多腔磁控管的发明，而这又带来了对收发双工机与接收器的需要，反过来又需求更高频率的磁控管…就这样转来转去，雷达因此获益良多。

Ltd, which was founded in 2002, designs and manufactures a series of passive devices, such as filters, duplexers, couplings and multi-frequency band mixers in communication frequency bands of DCS, GSM, CDMA and 3G.

南京震宇通信技术有限公司成立于2002年，创业以来，公司先后在DCS、GSM、CDMA、3G通信频段内设计生产了一系列滤波器、双工器、耦合器、多频合路器等无源器件。

GaAs RF switch MMICs for cellular phone; GaAs RF power amplifier MMICs for cellular phone; GaAs RF switch MMICs for base station; GaAs RF attenuator MMICs for base station; RF module for base station; GaAs power amplifier MMICs for CATV; MOSFET power devices;SAW resonators; SAW filters; SAW duplexers; N type and P type 4＂-6＂silicon epitaxial wafers.

这次参展的产品有：用于移动蜂窝电话的砷化镓射频单片集成电路；用于移动通信基站的射频IC及电路模块；用于CATV的砷化镓IC；MOSFET等功率器件；声表面波谐振器；声表面波滤波器；声表面波双工器；4＂-6＂N型和P型各类硅外延片。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失