Description
Number of floors 2
board thickness 1.6 ± 0.1mm
Dielectric Thickness 1.524mm
Plate used Rogers 4725JXR
Dielectric constant 2.55
Dielectric loss factor 0.0022(1 MHz)
0.0026(10GHz) Minimum hole diameter 0.2mm
TD 439
Thermal conductivity 0.38w/w.k
Process characteristics high-frequency materials, Rogers 4725JXR
Rogers 4725JXR is an antenna-grade laminate launched by Rogers Corporation, which has good passive intermodulation index and certain hardness, and can be processed in multiple layers and hybrid-pressed like FR-4 board, suitable for application scenarios such as antennas.
This board is based on a hydrocarbon resin system and has the following characteristics:
- Low insertion loss: In antenna applications, insertion loss is an important index. The Rogers 4725JXR antenna-grade laminate has a relatively low insertion loss, which can improve the performance of the antenna.
- Good passive intermodulation index: The passive intermodulation index is also very important for the performance of the antenna. This board has a good passive intermodulation index, which can ensure the normal operation of the antenna.
- Hardness: In some application scenarios of the antenna, the board is required to have a certain hardness, and the Rogers 4725JXR antenna-grade laminate can meet this need.
- Multi-layer processing and hybrid-pressing: This board can be processed in multiple layers and hybrid-pressed like FR-4 board, which is convenient for making multi-layer circuit boards.
In addition, there are studies that use Rogers 4725JXR material for the top layer of a composite electromagnetic absorbing structure with ultra-high frequency and ultra-wideband. Due to its relatively dielectric constant and relatively permeability being relatively close, it can better achieve the impedance matching condition, so that more electromagnetic radiation can enter the composite material, and then the commercial electromagnetic wave absorbing material is used to attenuate the electromagnetic wave, thereby improving the absorbing effect and the absorbing bandwidth.
