China 5G Spectrum Allocation and Filter Technology Requirements

## China 5G Spectrum Allocation and Filter Technology Requirements ### China 5G Spectrum Planning #### Operator Spectrum Allocation | Operator | Band | Bandwidth | System | |----------|------|-----------|--------| | China Mobile | n41 (2515-2675MHz) | 160MHz | TDD | | China Mobile | n79 (4800-4960MHz) | 160MHz | TDD | | China Unicom | n78 (3500-3600MHz) | 100MHz | TDD | | China Telecom | n78 (3500-3600MHz) | 100MHz | TDD | | China Broadcast | n28 (703-748MHz) | 45MHz | FDD | | China Broadcast | n79 (4900-4960MHz) | 60MHz | TDD | #### Millimeter Wave (Future) - **24.25-27.5GHz**: Trial band - **37-43.5GHz**: Potential commercial ### Filter Requirements by Band #### Sub-6GHz Bands (<6GHz) **n41 Band (2515-2675MHz)** - **Bandwidth**: 160MHz - **Requirements**: - Steep transition (adjacent protection) - High out-of-band suppression (avoid intermod) - Power capacity >100W **n78 Band (3500-3600MHz)** - **Bandwidth**: 100MHz - **Requirements**: - Low insertion loss (coverage optimization) - Good temperature stability **n79 Band (4800-4960MHz)** - **Bandwidth**: 160MHz - **Requirements**: - High suppression (adjacent to n77) - Wideband design #### Millimeter Wave Bands **Challenges**: - Wider bandwidth - Higher frequency - Stricter suppression **Filter Technologies**: - **LTCC**: Low Temperature Co-fired Ceramic - **BAW**: Bulk Acoustic Wave - **IPD**: Integrated Passive Devices ### Filter Selection Guide #### By Application | Application | Recommended Type | Reason | |-------------|------------------|--------| | Base station RRU | Cavity filter | High power, low loss | | Terminal device | SAW/BAW | Miniaturized, low cost | | Millimeter wave | LTCC/IPD | Wideband, high integration | #### Key Metrics Priority 1. **Insertion loss**: Directly affects coverage 2. **Out-of-band suppression**: Determines coexistence 3. **Power capacity**: Safety margin 4. **Temperature stability**: Reliability 5. **Size/weight**: Deployment convenience ### Pinbi Filter Product Coverage - ✅ **Cavity filters**: 700MHz-2.7GHz, covering n41/n28 - ✅ **SAW filters**: 2.4GHz/5GHz, for WiFi 6E - ✅ **Customization**: Custom development per band requirement