Johanson Technology has released 7987AT45A0200002E, an RoHS-compliant surface-mount ceramic patch antenna designed for Ultra-Wideband (UWB) automotive applications, with a focus on keyless entry, secure vehicle access, and short-range communications. This antenna delivers targeted performance on UWB Channel 9, operating at 7987 MHz ±100 MHz; however, it can be tuned to accommodate other channels.
The antenna provides directional radiation with a typical peak gain of 3.5 dBi, focusing energy normal to the PCB surface (+Z direction). It is AEC-Q200 qualified and rated for operation from -40 °C to +105 °C. This confirms that the device can withstand temperature cycling, vibration, and long service life requirements (good for industry and automotive). Compatible with standard SMT reflow assembly processes, it is supplied as a surface-mount device (SMD) measuring 4.0 × 4.0 × 1.5 mm. It is manufactured using Low-Temperature Co-Fired Ceramic (LTCC) technology, offering high detuning resilience and thermal stability.
The antenna is intended for directional UWB systems, which require predictable radiation patterns and high positional accuracy rather than omnidirectional coverage. A few applications include automotive smart access and keyless entry, ranging and localization, Angle-of-Arrival (AoA) sensing, radar, and autonomous mobile robot (AMR) beacons.
The antenna supports center, edge, or corner PCB mounting, with recommended layout guidance and ground-via use. Placement flexibility simplifies mechanical design decisions and allows engineers to adjust antenna location without completely redesigning the RF section. Johanson Technology provides evaluation boards, recommended matching components, and HFSS/CST 3D EM simulation models for this antenna. Availability of validated reference materials reduces integration risk and development time for RF designers.