B39941B9802J610S5

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Surface Acoustic Wave (SAW) filters are solutions which take full advantage of the acoustic wave’s mechanical properties in order to specialize the performance of a product. B39941B9802J610S5 is a SAW filter designed to cover a fixed frequency range, and they are typically used in an RF receiver to filter or select signals within a given bandwidth. This type of filter is also frequently used as a tuning technology in radio receivers for cellular devices, radios, television receivers, GPS systems or in RFID applications.

The B39941B9802J610S5 provides improved performance for channels in a variety of services such as GSM900, GSM1800, DCS1800, PCS1900, PHS1900, WCDMA, GPS and bluetooth, with improved immeasurable and blocking characteristics. It is a simple and reliable filter with enhanced out-of-band rejection, excellent flatness and temperature compensation.

The basic principles behind these filter types operate on the physics of surface acoustic waves. This is a type of acoustic wave travelling across the surface of a material in addition to the motion of the material itself, much like an echoing ripple on a lake. SAW filters consist of two electrodes, interdigital transducers (IDTs) and a piezo-electric substrate. An electrical signal enters the filter and is then converted into a surface acoustic wave by the IDTs. This wave then propagates among the electrodes on the piezoelectric substrate, before emerging from the other side and being converted back into an electrical signal.

The frequency range and passband can be tailored by the layout of the electrodes—more complex structures permit extremely narrow and very high Q (high performance) filters. This low pass filter, or “brick wall” characteristic, is determined by the IDTs, and this is where the B39941B9802J610S5 gains its advantage—by providing better selectivity that can be adjusted based on the design and technology used.

Part of the key success of the B39941B9802J610S5 is the strength of materials used. In choosing the right substrate material for the SAW filter, factors such as temperature stability or sensitivity of frequency, amplitude and bandwidth need to be taken into consideration. The B39941B9802J610S5 has been manufactured using a high dielectric constant material, matched to guarantee low insertion loss, which is why it provides such low addition loss and rejects out of band signals.

The construction process is critical to the performance of a SAW filter, and much of the emphasis lies on patterning the photo-resist layer on the piezoelectric substrate. The patterning process determines the size, shape and number of IDTs that the tool will create as well as the filter’s operating characteristics. For the B39941B9802J610S5 the number of IDTs is standardised, ensuring uniformity of performance across the entire range and you don’t have to worry about complex patterning.

By using a combination of a low insertion loss and advanced symmetrical structures, the B39941B9802J610S5 provides perfect filtering capabilities, which makes it a preferred filter for a broad range of applications. Not only that, the filter is versatile enough to be easily integrated into multiple devices and electronic systems, from cellular phones to wireless communication devices.

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