Does it work as a High Pass Filter ?

I haven't torn one apart, but I suspect it's a simple finely-tuned a tank circuit that shunts specific frequencies to ground (a simpler method than blocking) which would be considered a notch filter vs. a high or low pass filter. In either case, it works very well for me. I live next to a call tower, and due to our proximity, we couldn't get any more than a few channels. Once the filter was placed between the antenna and our distribution amplifier, we jumped from a handful to over 70 channels now available.

what is the rejection (in dB) and what is the insertion loss (in dB)? All traps/filters must have at least some insertion loss, even if it's .5 dB.

With a 4' antenna cord rejection is .1 to .3 and loss is .5 to .8 depending on connection type.

Does this only work for amplified antennas?

Thank you for your question. It works for both amplified and regular antennas, but if your antenna was purchased in 2020 or later it should have a filter built in already.

does it fix radio fm recept?

No. It is a cell signal filter for a tv antenna. It's only made to improve tv reception more so if you are close to a cell phone tower.

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📡 Cut the noise, keep the signal—watch like a pro!

EFFORTLESS INSTALLATION - Plug-and-play design with no extra hardware or power required
UNIVERSAL COMPATIBILITY - Seamlessly integrates with any TV antenna or coax setup
CRYSTAL CLEAR HD RECEPTION - TruAmp tech filters out 4G/5G interference for uninterrupted viewing
TRUSTED SUPPORT WARRANTY - U.S.-based tech help plus limited-lifetime replacement guarantee
BUILT TO BRAVE THE ELEMENTS - Durable weatherproof casing for reliable indoor/outdoor use

The Philips LTE Filter SDW1520/27 uses advanced TruAmp technology to block disruptive 4G and 5G LTE signals, ensuring crisp digital HD TV reception. Compatible with all coax-based antenna setups, it installs easily without extra power or hardware. Its weatherproof design supports both indoor and outdoor use, backed by U.S.-based technical support and a limited-lifetime replacement warranty.

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Brand Name	Philips
Item Weight	0.317 ounces
Package Dimensions	3.62 x 2.72 x 0.83 inches
Item model number	SDW1520/27
Color Name	Silver
Special Features	Low Loss, Low Profile, Signal Booster, Wireless
Impedance	75 Ohm

Philips LTE Filter for TV Antenna, Filters 4G 5G LTE Signal to Reduce Interference and Pixilation for Clear Digital HD TV Reception, Frequency Range 5-608 MHz, Indoor Outdoor Installation, SDW1520/27

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