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2 Way 7dB antenna coupler 400 900MHz UHF CDMA - avto-sovetu.ru
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HYS 2 Way 7dB 450MHz antenna coupler 400-900MHz UHF 2 way radio power splitter for CDMA 450mhz repeater ELECTRICAL SPECIFICATIONS Frequency Range:400-900MHz Coupling:7Db Insertion Loss:¡Ü1.4dB Ripple in-band:¡Ü¡À0.6dB Directionality:¡Ý20dB PLM :¡Ü-120@+43dBm¡Á2dBc V.S.W.R.:¡Ü 1.3 dB Impedance:50¦¸ Power Capacitance:100W

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Power dividers (also power splitters and, when used in reverse, power combiners) and directional couplers are passive devices used mostly in the field of radio technology. They couple a defined amount of the electromagnetic power in a transmission line to a port enabling the signal to be used in another circuit. An essential feature of directional couplers is that they only couple power ...

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What is an Antenna Coupler? (with pictures)

Antenna couplers make it possible for one or two antennas to do the electrical work of many, instead of having to use a separate antenna for each individual wavelength. The process of changing an antenna's electronic abilities is known as "antenna tuning." Antenna tuning involves changing the electrical length of an antenna as well as its compatibility with various types of transmitters and ...

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The coupler has three terminals: the input, the through and the coupling. According to the power difference between the input and the coupling end, there are 5dB, 6dB, 7dB, 10dB, 15dB coupler etc. It can also be divided into 1:1, 2:1, 4:1 and the other models according to the ratio of the through and the coupling ends. Of course, both the power splitter and the coupler are lossy.

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Typical coupling values found in practice are 3, 6, 10, 20, 30, 40 & 50 dB; however, practically any coupling value may be obtained through proper design. A dual directional coupler (figure 2 ) is essentially two single directional couplers connected back-to-back sharing a common mainline and providing two output ports with high isolation between those ports.

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Figure 2 . Common Applications Carriers are often faced with the challenge of adding next generation services while trying to keep CAPX equipment costs low. An economical solution to this problem is to combine two transmitters with a hybrid coupler to share one antenna, thus freeing up another antenna for the overlay.

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second harmonic filters. Each transmitter to the antenna experiences approximately 7dB of loss. That is a trade off for being able to combine 4-closely spaced transmitters on to a single antenna. If not for the use of directional couplers, this system would require at least 2-antennas and possible a number of bandpass and notch cavities.

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