SF2079D-1

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Surface Acoustic Wave (SAW) filters are electronic devices used in communication systems to separate or reject unwanted frequencies. The SF2079D-1 is a SAW filter designed to block unwanted noise and interference in mobile communication systems. It is an ideal filter for switching between multiple communication systems, such as GSM, CDMA, 3G and 4G.

The SF2079D-1 filter is manufactured using vacuum vapor deposition, whereby two thin layers of alumina (Al₂O₃) are placed over a single-face piezoelectric quartz substrate. One layer is conductive and the other is insulative. A vacuum deposition process deposits tiny electrodes on the conductive layer. The electrodes are connected to small components in a rectangular pattern to form a grid. When a specific electrical signal (input) is applied to the filter, the quartz surface vibrates, allowing a different type of signal (output) to pass through. This process is known as "interaction between surface acoustic waves and the electrical signal". In essence, the SF2079D-1 SAW filter can be thought of as a selective electrical resonator that passes only the desired frequencies through while blocking any unwanted frequencies.

The SF2079D-1 has a passband frequency range from 8.35 MHz to 8.7 MHz and a -3dB bandwidth of 0.3 MHz. The insertion loss is 1.6 dB max, and the return loss is 17 dB min. The filter is highly stable and has good frequency selectivity capabilities. It is one of the most reliable SAW filters available, and it operates over a wide temperature range from -30°C to +85°C. The SF2079D-1 has a low-current consumption rate of 21 mA (typically) and is designed to operate on a very low standby current of 0.15µA.

In terms of application field, the SF2079D-1 is ideal for use in mobile radio communication systems such as GSM, CDMA, 3G, 4G, LTE and similar systems. It can also be used in satellite communications, as well as radio transmitting and receiving systems. The SF2079D-1 is a high-quality filter that is designed to suppress interference, which can cause poor communication and static. It is an essential component in mobile communication systems, ensuring optimal performance.

In conclusion, the SF2079D-1 SAW filter is an ideal choice for suppressing noise and interference in mobile communication systems. It is an advanced filter with a wide application field, and it operates over a large temperature range. This filter is highly reliable and offers excellent frequency selectivity capabilities. It is an ideal filter for switching between multiple communication systems such as GSM, CDMA, 3G, 4G, LTE and other radio systems.

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