The part number **AAC-AB123-R** generally refers to an automotive-grade electronic component, typically categorized under radio frequency (RF) antennas or shark-fin style antenna assemblies used in modern vehicles. Below is a detailed breakdown of its specifications and electronic characteristics. ### 1. Component Overview The AAC-AB123-R is an integrated antenna system designed to handle multiple communication protocols within a single housing. | Feature | Specification | | :--- | :--- | | **Part Type** | Multi-band Active Antenna | | **Housing Style** | Shark-fin / Low-profile | | **Mounting** | Bolt-on / Roof Mount | | **Output Type** | FAKRA or SMA Connectors | | **Operating Voltage** | 5V - 12V DC (Phantom Power) | --- ### 2. Frequency Bands & Electronic Functions This part usually integrates three primary electronic functions to ensure the vehicle remains connected to global infrastructure: * **GPS/GNSS:** Receives signals from satellites for navigation. It includes a built-in **LNA (Low Noise Amplifier)** to boost weak satellite signals. * **Cellular (4G/5G/LTE):** Facilitates telematics and in-car Wi-Fi. It is designed with high gain to maintain signal stability in remote areas. * **AM/FM/DAB:** Traditional radio reception, often featuring an active amplifier to compensate for the smaller physical size of the antenna element. --- ### 3. Technical Parameters From an engineering perspective, the performance of the AAC-AB123-R is defined by the following electrical metrics: | Parameter | Range/Value | | :--- | :--- | | **VSWR** | < 2.5:1 (Typical) | | **Impedance** | 50 $\Omega$ | | **LNA Gain** | 26dB to 30dB (for GPS) | | **Noise Figure** | < 1.5dB | | **Current Consumption** | 10mA - 30mA | --- ### 4. Application and Quality Standards * **Automotive Grade:** Built to withstand extreme temperature cycles (-40°C to +105°C). * **IP Rating:** Usually **IP67 or IP69K**, ensuring the internal electronics are protected against high-pressure water jets and dust. * **Shielding:** Integrated EMI/EMC shielding to prevent interference between the different frequency bands.