Comba Telecom System (china) Ltd

Mengmeng Shu

Tao He

Bin He

Jingmin Huang

Yingjie Di

The invention discloses a DCS/WCDMA dual frequency multiplexer. On one hand, the multiplexer utilizes distributed parameter type capacitors in place of conventionally used capacitors. On the other hand, within the multiplexer, a direct circuit and a RF circuit are isolated from each other physically. All components including capacitors co-exist together physically. Similarly, the invention further discloses a dual frequency multiplexer with large application range. It also utilizes the distributed parameter type capacitors like the DCS/WCDMA dual frequency multiplexer. Because the invention has redesigned the entire construction of the multiplexer, it results good effects such as small size, less differential loss, large power capacity, as well as high isolation degree between circuits.

DCS/WCDMA dual frequency synthesizer and a general dual frequency synthesizer

The invention discloses a dual frequency multiplexer by which a first and second coaxial harmonic oscillator type band pass filters are disposed in a box. The box includes a base body, a cover plate and a cover body. The two coaxial harmonic oscillator type hand pass filters are located on the base body and spaced each other by a metal plate; the multiplexer port, first and second ports are positioned on lateral side of the base body. The blocking capacitors are contained in the coaxial chamber of the two coaxial harmonic oscillator type band pass filters. The cover plate is secured on the base body; the first and second direct current circuits are placed on the cover plate; the low pass filters of the first and second direct current circuits are fixed on an edge of a top surface of the coaxial chamber by means of a support member; the cover body and the base body are fastened with each other. The blocking capacitors each are of distributed parameter capacitor. Utilization of distributed blocking capacitors makes the product of the invention small. Moreover, improvement of the structure of the invention brings effect such as less differential loss, large power capacity, as well as high isolation degree between circuits.

Dual-frequency multiplexer

An ultra wideband dual-frequency combiner includes a combination port (Port), a first port (Port), a second port (Port), two coaxial resonator band pass filters and two direct current channels. The first direct current channel is connected between the first port (Port) and the combination port (Port). The second direct current channel is connected between the second port (Port) and the combination port (Port). One end of the first coaxial resonator hand pass filters () is electrically connected with the first port (Port) via a first blocking capacitor. One end of the second coaxial resonator hand pass filter () is electrically connected with the second port (Port) via a second blocking capacitor. The other ends of the first coaxial resonator band pass filter and the second coaxial resonator band pass filter are connected with the combination port (Port) via a third blocking capacitor. The blocking capacitors are parameter distributed capacitors.

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Guangzhou, China

Mengmeng Shu