HSMS-2810-TR1

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The HSMS-2810-TR1 is a Surface Mount (SMT) double-balanced mixer that operates from 8.2 to 13 GHz. It features a typical conversion loss of 8.4 dB with typical sideband rejection of ∼20dBc. The HSMS-2810-TR1is suitable for use as a down converter in a wide range of commercial and military RF communications and radar systems. This article will discuss the application fields and working principles of the HSMS-2810-TR1.

Application Fields

The HSMS-2810-TR1 is designed for use in a classic double-balanced mixer architecture in which a local oscillator (LO) is combined with an RF signal to produce an output that contains the sum and difference of the RF and LO frequencies. Compared to single-balanced mixers, double-balanced mixers have a higher level of isolation between the input and output ports, which reduces spurious products and allows higher input power levels to be applied. Thus, the HSMS-2810-TR1 is ideal for use in receiver applications that require low isolation between ports while maintaining high conversion loss and sideband rejection ratios.

The HSMS-2810-TR1 is suitable for use in receivers for commercial and military communications systems such as point-to-point and point-to-multipoint systems, satellite communications systems, satellite navigation systems (GPS, GLONASS and Galileo), and emerging cognitive radio systems. It can also be used in radar systems for the detection and tracking of moving targets. The low conversion losses and sideband rejection of the HSMS-2810-TR1 make it well-suited for receivers in these systems, which require a high level of performance to function effectively.

Working Principle

The HSMS-2810-TR1 is a passive double-balanced mixer that operates over the 8.2 to 13 GHz frequency range. It is constructed using an imitation-biased symmetrical structure that provides superior conversion loss and sideband rejection performance. The device has four ports: an RF input port, an LO input port, an IF output port, and a DC bias port. The RF and LO signals are combined at the mixer’s input ports and the IF signal is output at the IF port.

The operation of the HSMS-2810-TR1 is based on the nonlinear operation of the Mixer Element. The Mixer Element is a transmission line section with a PIN diode integrated into the center conductor. In the bias condition, the PIN diode impedance is high and the transmission line is essentially lossless. When an LO or an RF voltage is applied to the diode, the diode impedance is reduced allowing the RF and LO frequencies to mix and produce an IF output. This IF output is then available at the IF port. The Mixer Element is connected in an imitation-biased configuration, which allows for a higher isolation between the input and output ports, resulting in a better sideband rejection ratio.

The HSMS-2810-TR1 is designed to use a wide range of operating voltages, up to 15V, which allows it to be used in applications requiring a wide range of power levels. It includes a DC bias port which allows for the use of bias tee devices that can isolate the DC bias from the RF and LO signals. The device is hermetically sealed and can be mounted directly to the PCB using surface mount technology (SMT).

Conclusion

The HSMS-2810-TR1 is a 8.2 to 13 GHz double-balanced surface mount mixer that is ideal for use as a down-converter in commercial and military RF communications and radar systems. It has a low conversion loss and high sideband rejection ratio which makes it ideal for receivers in these applications. It includes a DC bias port and is suitable for use with a wide range of operating voltages. The device is hermetically sealed and is easy to mount directly to the PCB using standard SMT techniques.

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