RBBPF3225180C67B1U

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RF Filters have been a visible part of electronics for decades and are still widely used in the majority of devices, from audio equipment like your home theater system, to the ever-important wireless communication base-stations. The RBBPF3225180C67B1U is one such filter with a variety of applications and working principles which will be explored in this article.

Introduction to RBBPF3225180C67B1U

The RBBPF3225180C67B1U is a miniature low-pass filter from the Huber+Suhner product portfolio. It is an SMA terminated surface mount filter offering a wide frequency range of 1.8 to 2.5 GHz. RBBPF3225180C67B1U is primarily used as an intermediate stage filter between the low-noise amplifier (LNA) and transmitter/receiver in wireless communication designs.

RBBPF3225180C67B1U filter is designed to offer the optimum combination of low loss, steep attenuation and size. This makes it an ideal solution for reducing unwanted out-of-band interference and optimizing receive/transmit gain.

RBBPF3225180C67B1U Application Fields

RBBPF3225180C67B1U low-pass filter is suitable for a wide range of wireless communication applications including military, industrial and commercial applications. Its low loss, wide frequency range and small size makes it an ideal solution for GSM/UMTS, HSDPA/HSUPA, EDGE, CDMA, W-CDMA LNA designs.

RBBPF3225180C67B1U can also be used for Wi-Fi and ZigBee applications. Its low loss nature allows for better receive gain while its flat response reduces group delays. Additionally, RBBPF3225180C67B1U is an excellent choice for base-stations of both fixed wireless communication systems as well as point-to-multipoint networks.

RBBPF3225180C67B1U Working Principle

RBBPF3225180C67B1U is a passive filter that relies on distributed elements for its operation. These elements act as resonators which reject certain frequencies when there is a match between the frequency and the resonance. Due to this, the filter offers good attenuation at desired frequencies and minimizes insertion loss at other undesired frequencies.

RBBPF3225180C67B1U utilizes a combination of distributed inductance and capacitance across its design to achieve a low-pass filter response. The RBBPF3225180C67B1U is designed with two transmission lines consisting of seven nested sections which creates multiple poles and zeros for the stop-band and pass-band respectively.

This filter has an insertion loss of 0.16 dB and a VSWR of 1.14 at its center frequency of 2.15 GHz. RBBPF3225180C67B1U also offers high isolation with a minimum of 40 dB in the stop-band.

Conclusion

RBBPF3225180C67B1U low-pass filter is an excellent choice for wireless communication base-stations and systems. Its wide operating frequency, high isolation and low loss make it suitable for a variety of applications from GSM/UMTS, HSDPA/HSUPA, EDGE, CDMA, W-CDMA LNA designs to Wi-Fi and ZigBee applications.

RBBPF3225180C67B1U is a passive filter which utilizes a combination of inductance and capacitance elements to achieve its low-pass filter response. Its transmission lines consisting of seven nested sections create multiple poles and zeros to yield a low insertion loss and good attenuation in the stop-band. The RBBPF3225180C67B1U offers excellent performance at its center frequency of 2.15 GHz with an insertion loss of 0.16 dB and a VSWR of 1.14.

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