PU Foam based Pyramid RF Absorbers

1. Characteristics

1) Such absorbers have a pyramid-shaped appearance, with blue color (it can be selected as request)
2) Pliable and flexible, the pyramids won’t bend in long-term use, and its absorbing properties won’t be changed within 10 years.
3) Oxygen index: 32% (GB/T2406.2-2009), it can meetthe requirements of test I voltage-resistant, test II difficulty of flame ignition and propagation,test III flame-resistant test ofNavylaboratory reportNRL8093(1977).

4) Good environmental performance, all raw materials can meet the environmental requirements, no volatile, no smell and non-toxic.
5) Working conditions: general indoor application
Long-time working temperature: -50°C~90°C
Short-time working temperature: -100°C~120°C
Relative humidity: 55%±15%
Frequency range: 30MHz~110GHz

6) Installation method: it generally use an environmental protective adhesive to paste the absorbers on the shield body; when the absorbers’ height is below 500mm, Velcro installation can be applied; furthermore, we can also adopt the fasteners to install the absorbers, which would facilitate the replacement of absorbers and the relocation of chambers.

2. Schematic diagram of PU foam based microwave absorbers

3.Product code

PXB-J［］→”PXB-J” refers to “product code”, “[ ] ” refers to “overall height of
absorbers”. (Pyramid absorbers)

4.Product specification

5.Product Performance (reflection loss)

Note:

1) for the data below 500MHz, it is obtained by low-frequency coaxial test method (GJB5239-2004); while for the data above 1GHz, it is obtained by far-field RCS test method (GJB2038A-2011)

2) The performance data listed in the above table is the guaranteed data, and the measured data would be equal to or better than the guaranteed data.

Nanjing HDF Electronic Engineering Co., Ltd. is specialized in producing microwave absorbers, anechoic chamber, antenna measurement systems and related auxiliary materials and equipments. With the stong support from the domestic well-known experts and scholars, HDF has acquired comprehensive engineering experience in development and production of microwave absorbers, microwave anechoic chambers and antenna measurement system and related design engineering. HDF has constructed more than 180 sets of various anechoic chambers and integrated over 30 sets of antenna measurement systems in the field of wireless communication, radar, aerospace and civil electronics. Furthermore, HDF is the biggest manufacturer of nonflammable absorbes in mainland of China.

HDF company has more than 5,000 square meters of production workshop (plant), and lots of production equipments including indentation machines, grinding machines, folding machines, cutting machines and etc; HDF company has established a strictly quality control system, equipped with shielding detection system, absorbers absorbing performance test systems and turntable testing equipment. We used to produce the products in accordance with GB/T19001-2000 quality system, and our products have been widely applied in the test field of aircraft, radar, missiles, communications and etc.