TWPC-4505-2 Bandpass Cavity Filters 400-512 MHz


  • Dual Bandpass Cavity Filter
  • Frequency Range: 400-512 MHz
  • Insertion Loss: 2-4 dB
  • VSWR: 1.5:1
  • Cavity Diameter: 5″

Please add frequency range (MHz) in a message box below. If you order more than one unit and want to have a different frequency for each unit, please let us know the product quantity for each frequency in the message box below too.

SKU: TWPC-4505-2 Categories: , Tags: ,

Product Description

The Telewave TWPC-4505-2 Bandpass Cavity Filters 400-512 MHz, are dual 5” diameter, ¾ wavelength, high “Q” bandpass cavity filters with superior selectivity. Bandpass cavities reject all frequencies outside a narrow pass band. These cavities reduce transmitter sideband noise, and also protect receivers against desensitization.

TWPC-4505-2 cavities cover 400-512 MHz. All cavities are tuned to specified frequencies prior to shipping, and no further adjustments should be required. The positive locking mechanism allows for quick field retuning if frequency changes become necessary. These cavities also feature calibrated adjustable coupling, and insertion loss can be easily set from 1 dB to 4 dB or more to improve selectivity. This allows cavity response to be optimized for any operating environment. At densely populated sites, the 4505-2 and 4505-3 cavity filters provide greater selectivity with minimum insertion loss. Multiple cavities can also provide a wider passband when required. Mounting rails are provided for all multiple-cavity filters.

Excellent frequency stability is achieved by the use of a specially machined compensator and Invar rod. The pass frequency is temperature stable from -30°C to +70°C. Telewave Ground Loop technology places the center conductor of each coupling loop at DC ground potential for lightning protection and noise reduction. Heavy duty materials are used throughout each cavity to insure high performance and long life. Cavity top plates are machined from ¼ -inch aluminum, and are heliarc welded to the cavity body at the high current point for improved conductivity and strength. This allows Telewave cavities to handle up to 350 watts, depending on insertion loss. Rigid foam inserts support the tuner assembly allowing vertical or horizontal mounting. Similar metals and alodined aluminum help prevent galvanic corrosion. Silver plated tuners and beryllium copper finger stock provide non-corrosive low loss contact, and ensure reliable, long-term performance.

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Free Ground Shipping – For expedited shipment please contact Telewave by clicking “Request more information” tab to the left, or please call (800) 331-3396

Free Ground Shipping – For expedited shipment please contact Telewave by clicking “Request more information” tab to the left, or please call (800) 331-3396

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