MMIC
REFLECTIONLESS FILTERS
50Ω DC to 21 GHz
XBF
XHF
The Big Deal
XLF
• Patented design eliminates in band spurs
• Pass band cut-off up to 21 GHz
• Stop band up to 35 GHz
X-Series
Available in Low Pass, High
Pass and Band Pass designs
• Excellent repeatability through IPD* process
Product Overview
Mini-Circuits’ X-Series reflectionless filters employs a novel filter topology which absorbs and terminates
stop band signals internally rather than reflecting them back to the source. This new capability enables
unique applications for filter circuits beyond those suited to traditional approaches. Traditional filters are
reflective in the stop band, sending signals back to the source at 100% of the power level which interact
with neighboring components and often result in intermodulation and other interferences. Reflectionless
filters eliminate stop band reflections, allowing them to be paired with sensitive devices and used in ap-
plications that otherwise require circuits such as isolation amplifiers or attenuators.
Key Features
Easy integration with sensitive reflective
components, e.g. mixers, multipliers
Advantages
Reflectionless filters absorb unwanted signals, preventing reflections back to the
source. This reduces generation of additional unwanted signals without the need
for extra components like attenuators, improving system dynamic range and sav-
ing board space.
Enables stable integration of wideband
amplifiers
Because reflectionless filters maintain good impedance in the stop band; they
can be integrated with high gain, wideband amplifiers without the risk of creating
instabilities in these out of band regions.
Cascadable
Reflectionless filters can be cascaded in multiple sections to provide sharper and
higher attenuation, while also preventing any standing waves that could affect
pass band signals.
Excellent power handling in a tiny surface
mount device
High power handling extends the usability of these filters to the transmit path for
inter-stage filtering.
Small size, 3x3mm QFN
Allows replacement of filter/attenuator pairs with a single reflectionless filter, sav-
ing board space.
Excellent repeatability of RF performance
Excellent stability over temperature
Operating temperature up to 105˚C
Through semiconductor IPD process, X-series filters are inherently repeatable for
large volume production.
With 0.3 dB variation over temperature ideal for use in wide temperature range
applications without the need for additional temperature compensation.
Suitable for operation close to high power components.
*IPD – Integrated Passive Device, is a GaAs semiconductor process
®
Mini-Circuits
www.minicircuits.com P.O. Box 350166, Brooklyn, NY 11235-0003 (718) 934-4500 sales@minicircuits.com
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