SF1220G

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Surface Acoustic Wave (SAW) filters are semiconductor-based chip devices. They are used to eliminate unwanted signals from communication receiving circuits, and to select wanted signals of a certain frequency in order to improve the signal-to-noise ratio. The SF1220G is a SAW filter designed for enhanced performance and bandwidth control. It is a low insertion loss, single-ended, low pass SAW filter particularly designed for interfacing with 0.2GHz-1.4GHz free running oscillators.

The SF1220G works on the transducing policy of acoustic waves. The planar surface is separated by an electrode which act as transducer and reflector. This reflector has an etched comb structure made of metal whose fingers are placed in gap of the arms of a comb-like structure, which are connected with transducers. This comb structure resonates at a certain frequency corresponding to the length of the comb fingers. Acoustic reflections make the surface to vibrate and are interpreted as electric pulses. This vibration of the surface of the deviceinduces a signal at both sides, which is how the SAW filter works.

The SF1220G filter is a unique solution for eliminating unwanted signals received in the 1GHz to 2GHz range used in GSM receivers. It is ideal for use in mobile and base station transmitters, as well as in Wi-Fi and DVB-T receivers. The SF1220G operates with low power consumption, a low insertion loss, low operating temperature range, and a high frequency stability. It is also resistant to vibration and shock, making it great for applications that require a reliable and robust design. The SF1220G also provides excellent suppression of unwanted signals at higher order harmonics.

The SF1220G has many advantages over traditional SAW filters such as a broad operating temperature range, wide frequency range, low insertion loss, low power consumption, high frequency stability, and low reflection. Its wide operating temperature range of -40°C to 105°C, broad frequency range of 1 GHz in ± 20 kHz, and high frequency stability of ±1 kHz provide engineers with the flexibility they need to design systems that are resistant to temperature fluctuations during testing or production phases. The low reflection of -50 dB is perfect for low noise operation, while its low insertion loss of -50 dB enables systems to have the highest peak capabilities.

The high frequency stability of the SF1220G means that it is able to maintain its transmission characteristics over other environmental resistances such as vibration or shock. Its low power consumption also provides for longer battery life in mobile and wireless applications. Because of these advantages, the SF1220G SAW filter has proven to be the choice filter for applications requiring these qualities.

In summary, the use of the SF1220G SAW filter provides frequency discrimination and frequency stability allowing a receiver to detect only the desired signal and blocking unwanted frequencies. It also helps to boost the signal-to-noise ratio of the receiver, improving the overall performance. Additionally, the SF1220G has low insertion loss, high frequency stability, low power consumption, and resistance to vibration and shock. As a result, the SF1220G is the ideal choice for improving performance in RF applications.

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