FM300 / Frequency multiplication
The FM300 converts a specified input frequency to a sinewave output at three times that frequency. Input conditioning, harmonic selection and output drive are included in the module, with filtering configured for the required conversion.
Circuit functions
The FM300 uses input conditioning, harmonic selection, and an output amplifier to produce a usable tripled-frequency signal. These functions are built into the module, along with the filtering and interfaces needed to connect it to the source and load.
Signal path · swipe or scroll to follow the arrows →
Coupling, termination and bias establish the RF loading and the operating point at the limiter input.
The limiting stage produces a switching waveform containing the third harmonic, along with other frequency components.
The interstage filter passes the required band around the third harmonic and attenuates separated unwanted components.
An active stage drives the output filter. Coupling and attenuation complete the interface to the specified load.
The source, coupling network, and input load determine the signal at the limiter. Sufficient amplitude and slew rate ensure reliable switching.
The interstage filter selects the third harmonic and couples it to the output amplifier. The filter and amplifier stages are designed together, accounting for their impedances and loading.
Onboard regulation and decoupling supply the active stages. RF connectors and DC power connections simplify bench evaluation and installation in equipment.
Configuration
The FM300’s filters are selected for the required input and output frequencies. They pass the desired third harmonic while attenuating unwanted frequency components.
Each module is configured for the customer’s specified input and output frequencies.
Fixed-frequency and broadband multiplication · TA-102 Rev – ↗Equipment integration
The RF connectors provide access for bench evaluation and cable interconnection inside equipment. The connectorized module can remain the installed RF assembly after evaluation with the intended source and load.
FM300 mechanical drawing · Rev B, page 3 ↗
The FM301 is available upon customer request for direct PCB integration. It uses the same circuit and corresponding electrical specifications as the FM300.
FM301 package illustration, not a dimensional drawing. The exact pinout is pending.
Product illustrations are not to scale. The FM300 label identifies the illustrated configuration.
Output drive and filtering
The interstage filter selects the third harmonic from the input limiting stage and feeds it to the output amplifier.
Amplification can introduce additional harmonics, so a second filter reduces these components to provide a clean sine-wave output at the desired frequency.
Signal path · swipe or scroll to follow the arrows →
Selects the third harmonic
Provides output drive
Attenuates additional harmonics
Receives the filtered signal
Technical resources
The overview explains the supplied circuit functions. The datasheet provides the electrical and mechanical reference, while the articles develop the integration, filtering and modulation questions in greater detail.
PDF links open the existing documents in a new tab. For an application discussion, include the required frequency pair and the source, supply and load conditions.
Application and quotation inquiries
The source and receiving circuit determine the required conversion and interfaces. Include the following information so ERD can review the application and prepare a quotation.
