27dBm LTE700 B28+ LTE900 B8 Dual Band signal repeater
| Network Protocols: | TETRA/P25/DMR/GSM/WCDMA/LTE/NR/WiFi | Weight: | ≦10kgs |
| Max. Gain: | UL : 70±3 DB DL: 75±3 DB | Power Supply: | AC100-240V In， DC12V3A Out |
| Frequency Support: | LTE700+LTE900 | Dimensions: | 300*303*130.6mm |
| Output Power: | Uplink: 23±2dBm | Downlink: 27±2dBm | Noise Figure: | ≦ 6 DB |
| RF Connector: | 2*N-Female | ||
| High Light: | LTE700 B28 signal repeater,LTE900 B8 dual band repeater,27dBm 4G signal repeater |
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Model AT-GB28-27 is a high-performance dual-band signal repeater engineered to strengthen LTE700 (Band 28) and LTE900 (Band 8) coverage simultaneously. It delivers reliable in-building and outdoor signal enhancement for mobile networks operating in the 700 MHz and 900 MHz bands.
Model AT-GB28-27 — Dual-Band Technical Parameters
| Parameter | B8 (900 MHz) | B28 (700 MHz) |
|---|---|---|
| Frequency Range — Uplink | 880–915 MHz | 703–748 MHz |
| Frequency Range — Downlink | 925–960 MHz | 758–803 MHz |
| Bandwidth | 35 MHz | 45 MHz |
| Max. Gain — Uplink | 70 ± 3 dB | |
| Max. Gain — Downlink | 75 ± 3 dB | |
| Manual Gain Control | 31 dB in steps of 1 dB | |
| Automatic Gain Control | ≥ 20 dB | |
| Gain Flatness | ≤ ± 3 dB (peak-to-peak) | |
| Max. Input Power Without Damage | 0 dBm | |
| Output Power — Uplink | 20 ± 2 dBm | |
| Output Power — Downlink | 25 ± 2 dBm | |
| Spurious Emission — 9 kHz–1 GHz | ≤ −36 dBm | |
| Spurious Emission — 1 GHz–12.75 GHz | ≤ −30 dBm | |
| ACRR — ±20/100 MHz | ≤ −36 dBc/30 kHz | |
| ACRR — ±40/200 MHz | ≤ −40 dBc/30 kHz | |
| EVM | FDD: ≤ 8% | |
| Frequency Stability | ≤ ±0.01 ppm | |
| Noise Figure | ≤ 6 dB | |
| VSWR | ≤ 2 | |
| System Delay | ≤ 5 µs | |
| RF Connector | N-Female | |
| Impedance | 50 Ω | |
| Power Supply | DC 5V 6A | |
| Power Consumption | ≤ 250 W | |
| Dimensions | 300 * 303 * 130.6 mm | |
| Weight | ≤ 10 kg | |
| IP Rating | IP40 | |
| Operating Temperature | −25 °C to 55 °C | |
| Control & Monitoring — Local | USB / Type-C port / Wi-Fi (optional) | |
| Control & Monitoring — Remote | LTE modem (optional) | |
Reference coverage for the repeater platform. Output power range: 17–43 dBm.
| Band | Downlink (Tx) | Uplink (Rx) | Output Power |
|---|---|---|---|
| VHF | 136–174 MHz | 136–174 MHz | 17–43 dBm |
| UHF | 450–512 MHz | 450–512 MHz | 17–43 dBm |
| N71: 600 MHz | 617–652 MHz | 663–698 MHz | 17–43 dBm |
| N28: 700 MHz | 758–803 MHz | 703–748 MHz | 17–43 dBm |
| N5: 850 MHz | 869–894 MHz | 824–849 MHz | 17–43 dBm |
| N20: 800 MHz | 791–821 MHz | 832–862 MHz | 17–43 dBm |
| N8: 900 MHz | 925–960 MHz | 880–915 MHz | 17–43 dBm |
| N66: AWS | 2110–2170 MHz | 1710–1770 MHz | 17–43 dBm |
| N3: 1800 MHz | 1805–1880 MHz | 1710–1785 MHz | 17–43 dBm |
| N1: 2100 MHz | 2110–2170 MHz | 1920–1980 MHz | 17–43 dBm |
| N40: 2300 MHz | 2300–2400 MHz | 2300–2400 MHz | 17–43 dBm |
| N7: 2600 MHz | 2620–2690 MHz | 2500–2570 MHz | 17–43 dBm |
| N41: TD2600+ | 2496–2690 MHz | 2496–2690 MHz | 17–43 dBm |
| N78: 3500 MHz | 3300–3800 MHz | 3300–3800 MHz | 17–43 dBm |
| N77: 4000 MHz | 3800–4200 MHz | 3800–4200 MHz | 17–43 dBm |
- LCD display showing real-time input and output signal strength.
- Automatic isolation detection for stable operation and reduced interference.
- Capable of improving multiple mobile networks simultaneously.
- Built-in Automatic Gain Control (AGC) and Automatic Level Control (ALC).
- Center frequency movable for flexible deployment.
- NMS Lite for remote or local control and monitoring (optional).
Shenzhen A T N J Communication, located in Guangming District, Shenzhen, is a professional RF manufacturer with 16 years of experience, primarily engaged in R&D, production, manufacturing, sales, and technical services.
Our main products include Digital LTE/NR series repeaters, SDR core boards, passive devices, Digital DAS systems, and technical solutions for Public and Private (VHF, TETRA) network base stations, as well as wireless frequency modules.
We undertake OEM and ODM services and projects for various RF equipment, wireless repeaters, multi-frequency DAS systems, remote network management center OAM, and equipment provision for indoor and outdoor signal coverage projects.
Our mature digital band-selective repeaters have been successfully deployed in overseas mobile operator markets. Our product field is expanding to include Public Safety and Low Altitude Economic Construction applications, featuring Public and Private Network Digital Multi-subband Repeaters, wireless signal repeaters, Integrated Base Stations, civil countermeasures, and phased array radar technology.
We have also realized Digital fiber multi-frequency, UHF, TETRA, VHF, and Microwave frequency shift repeaters. As technology progresses, we continue to develop easier-to-use, more functional, and intelligent RF products. We look forward to collaborating with you to create a brighter future together.
Ready to elevate your next project? Our R&D team is here to help you succeed. Get in touch today:
WhatsApp: +86 188 1358 2037
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