A frequency multiplier is a circuit that produces an output signal with a frequency equal to an integer multiple of the input signal frequency. If the input frequency is f1, the output frequency is f0 = nf1, where the coefficient n is 2. Frequency multipliers are widely used in various applications. For example, transmitters use frequency multipliers to allow the master oscillator to operate at a lower frequency for improved frequency stability; frequency modulation equipment uses them to increase frequency deviation; in phase-keyed communication devices, frequency multipliers are a key component of the carrier recovery circuit. Power supply voltage: No power supply required; this is a passive frequency multiplier device. Input frequency: 4.08 GHz, output frequency range: 8.016.0 GHz. Input power: +10 dBm to +15 dBm, typical input +13 dBm. Frequency multiplication loss: 17 dB. Isolation: 42 dB (1F0, 3F0, 4F0). (The product appearance and printed markings may vary by batch, but this does not affect functionality.) Color: Green Material: PCB Package Contents: 1 x Frequency Multiplier Note: The package includes only the items listed above. Other items are not included. Light reflection and differences in display screens may cause slight variations in the color of the item shown in the image compared to the actual product. Measurement may have an allowable error of +/- 13 cm.