Nikram microwave absorption film suppresses noise from high-frequency electronic devices with bands over 2GHz. Noise suppression rating is greater than 30dB for GHz bands greater than four. Thin Nikram film reduces incoming and outgoing noises by mounting it on the surface of any housing; does not require grounding. Can allow metallic devices to become stealth against radar searches. Is 42.5µm thick; absorbs microwaves effectively. Suppression rates of the microwaves absorbed are 20dB at 2GHz, 30dB at 4GHz, and stable for frequencies greater than 4GHz. Does not reflect microwaves at the surface.

Nikkan, www.nikkan-ind.co.jp

RO4700JXR series antenna grade laminates were designed for use in base station, RFID and other antenna designs; combine low-loss dielectric with low-profile copper foil. Incorporate a hollow microsphere filler; are reportedly about 30% lighter weight than woven-glass PTFE materials. Feature low Z-axis coefficient of thermal expansion (CTE of <30 PPM/ºC). Have TCDk <40 PPM/ºC. Feature same glass transition temperature as RO4000 laminates, greater than 280ºC. Are compatible with PCB fabrication techniques and plated-through-hole processing. Designed for base station and other RFID antennas.

Rogers Corp., www.rogerscorp.com

NL9000 RF/microwave printed circuit board materials have a dissipation factor (Df) of 0.0017 at 10GHz using stripline testing methodology and a 0.5dB/cm attenuation loss at 77GHz for microstrip automotive radar applications. Come with dielectric constants (Dk) of 2.94, 3.00, 3.20 and 3.50. Are for low-loss, high-frequency transmission and antenna gain and directivity performance. Are said to be dimensionally stable for PCB fabrication, can be combined in hybrid multilayer constructions with other circuit materials, including digital circuit materials, and can be processed using standard PTFE parameters. Can be used in high-temperature, lead-free assemblies and in a range of temperature and humidity environments. Meet UL 94V-0 and IPC-4103 and are RoHS compliant.

Park Electrochemical/Neltec, parkelectro.com

Astra very low-loss dielectric constant printed circuit board material exhibits electrical properties that are constant over a broad frequency and temperature range. Is suitable for commercial RF/microwave printed circuit designs operating at 24 and 77 GHz frequencies.