Hi Morse Micro team,
We are currently investigating an RF interference issue in our Multi-HaLow setup and would like your guidance to determine whether the observed degradation is related to antenna coupling/isolation, adjacent-channel interference, receiver desensitization, or HaLow RF configuration.
Current RF Configuration
We have three HaLow Access Points operating at:
AP 1: 906 MHz
AP 2: 914 MHz
AP 3: 922 MHz
Frequency separation:
906 → 914 MHz: 8 MHz
914 → 922 MHz: 8 MHz
906 → 922 MHz: 16 MHz
All three APs use the following antenna:
Pulse/Larsen W1063/W1063M – 868–928 MHz swivel-type dipole antenna
Key specifications:
* Frequency range: 863–928 MHz
* Gain: 1 dBi
* Efficiency: 70%
* Impedance: 50 Ω
* VSWR: ≤2
* Radiation pattern: Omnidirectional
* Polarization: Linear
* Antenna length: 195 mm
* Power handling: 1 W
Antenna Placement on STAs
The three antennas are mounted vertically with approximately 1 ft (30 cm) separation between adjacent antennas:
STA3 – 922 MHz
|
| 1 ft
|
STA2 – 914 MHz
|
| 1 ft
|
STA1 – 906 MHz
Issue Observed
When all three APs are operating simultaneously, we observe increased interference and degradation in link performance.
Could you please advise how we can determine whether the observed interference is primarily caused by antenna placement/coupling or by the HaLow RF configuration and adjacent-channel interference, and what antenna spacing, isolation level, or RF measurements/test procedure you would recommend for this three-radio setup?**
We can perform the recommended tests and provide the RF and link measurements for further analysis.
Best Regards,
Arti