WiFi router antenna, modem antenna, 23cm 5M omni directional antenna

Sale WiFi router antenna, modem antenna, 23cm 5M omni directional antenna

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Specification:

Frequency Range: 698-960MHZ, 1710-2700MH.

Gain: 12 dBi

VSWR: <2.5 Polarization

Type: Vertical or horizontal

Radiation: Omni

Maximum Imput power: 10W

Input Impedance: 50 Ohms

Cable Type: RG58 50-3 cable

Cable length: 10 Meter

Demensions: about 23cm 63*63mm

Horizontal Half Power Angle: 360°

Vertical Half Power Angle: 70 15°

Lightning Protection: DC Ground Working

Temperature: -40°C-65 C

Connector: SMA male

Sale Onelinkmore WiFi Router Antenna Dual Band 2.4GHz 5GHz 10dbi RP-SMA

Sale Onelinkmore WiFi Router Antenna Dual Band 2.4GHz 5GHz 10dbi RP-SMA.

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Sale 9m Multifunctional Pole (Wifi, TV Antenna, Wireless etc.)

 Sale 9m Multifunctional Pole (Wifi, TV Antenna, Wireless etc.)

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Sale Moco Push Pull Connector

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op-amp introduction

Gain OP-AMP and Vout
Gain = RF/Rin || Vout = -Vin*(Rf/Rin)
Rf
Rin
Vin
Gain
Vout

The Operational Amplifier or OP-AMP is a high performance linear amplifier with an amazing variety of uses. The OP-AMP has two inputs, inverting(-) and Non-Inverting(+), and one output . The Polarity of a signal applied to the inverting input is reversed at the output. A Signal applied to the Non-Inverting input retains its polarity at the output.

The Gain (Degree of amplification) of an OP-AMP os determined by a feedback resistor that feeds . some of the amplified signal from the output to the inverting input, This reduces the amplitude of the output signal, hence the Gain. The smaller the resistor, the lower the Gain.

The Gaun is independent of the supply voltage. Note that the unused input is grounded. Therefore the OP-AMP amplifies the difference between the Input (Vin) and Ground (0 Volts). The OP-AMP is then a differential amplifier.

The feedback resistor (Rf) and an OP-AMP form a closed feedback loop, when Rf is omitted, the OP-AMP os said to be in its open loop mode. The OP-AMP then exhibits maximum Gain, buit its output then swings from full on to full off or vice versa for very small changes in input voltage. Therefore the open loop mode is not practical for linear amplification. Instead this mode is used to indicate when the voltage at one input differs from that at the other, In this mode the OP-AMP is called a comparator since it compares one input voltage with other.

Powering OP-AMPS

source : Op Amp IC Circuit , Mini Engineer's Notebook - Radio Shack