Equipment procurement consulting
Equipment procurement consulting is the final step in the consulting and design department at Iran Microwave. Nowadays, with the expansion of communication networks and the need for high bandwidth and stable connections, the use of microwave links as a cost-effective and reliable solution has increasingly attracted the attention of operators and organizations. However, selecting the appropriate equipment (from radios and antennas to accessories) is one of the main challenges for network engineers. Check out our various equipment!
Iran Microwave Company, with years of experience in designing, consulting, and implementing radio links, has prepared this comprehensive guide to help you:
– How to choose the best radio (Huawei or Ericsson) for your project?
– What Gain and angle of antenna are suitable for different distances?
– How do vital accessories (cables, PoE, grounding) affect link stability?
– How to calculate the required Availability level (e.g., 99.99%)?
In this article and previous ones, we have practically examined a real project (Tehran-Qazvin link) and provide a complete list of equipment, technical calculations, and comparative charts.
Choosing the right radio (technical comparison of Huawei vs. Ericsson)
Comparison Table of Common Models
| Notes | Huawei RTN 905 (All-IP) | Ericsson MINI-LINK 6366 (E-Band) | Parameter |
|---|---|---|---|
| Selection depends on capacity needs and frequency limitations | ۶-۴۲ GHz | ۷۰/۸۰ GHz (E-Band) | Frequency |
| Ericsson is more suitable for ultra-high capacity links | Up to 10 Gbps | Up to 2.5 Gbps | Capacity |
| Huawei is better for longer links | +۱۵ dBm to +20 dBm | +۲۳ dBm to +30 dBm | Output Power Range |
| Ericsson is more efficient | 50W | 35W | Power Consumption |
| Both support the most modern protocols | Yes | Yes | SDH/IP Connectivity |
Selecting the appropriate antenna (based on Gain and angle)
The relationship between Gain, frequency, and antenna diameter:
Gain(dBi) = 10 log₁₀ (η (πD / λ)²)
🔹 η: antenna efficiency (~60% for typical antennas)
🔹 D: antenna diameter (meters)
🔹 λ: wavelength (based on frequency)
important accessories
RF Cable:
- LDF4-50A Cable (Size: 1/2 inch) for low loss (~4 dB/100m at 2 GHz).
- Heliax Cable (Size: 7/8 inch) for long links (~2 dB/100m at 2 GHz).
Mounting Bracket:
- Stainless steel base with ±۵° angle adjustment for precise installation.
- PoE (Power over Ethernet): Huawei APM812 model (48V/0.5A output) for small radios.
- Earthing system: Copper rod with resistance ≤۵ ohms to prevent noise and lightning.
Link Availability Calculation
📉 Formula for calculating Availability based on ITU-R P.530:
Unavailability = Outage Probability × Time Period / 100
🔹 Example: For 99.99% Availability in one year:
۰.۰۱% × ۸۷۶۰ hours = 52 minutes Downtime
Steps to execute the Tehran-Qazvin project and a list of proposed equipment
Radio Selection (Based on Project Conditions)
📌 Comparison of Two Options:
| Final Selection | Ericsson MINI-LINK 6352 | Huawei RTN 910 | Parameter |
|---|---|---|---|
| Ericsson (due to higher capacity) | ۱.۵ Gbps | ۱ Gbps | Bandwidth |
| Ericsson (preferred for long distance) | -۸۸ dBm | -۸۵ dBm | Receiver Sensitivity |
| Huawei (better signal over long distance) | +۲۸ dBm | +۳۰ dBm | Output Power |
| Ericsson (more efficient) | ۵۵ Watts | ۶۰ Watts | Power Consumption |
Antenna Selection (Based on Gain and Angle)
📊 Antenna Gain Calculations:
Frequency: ۱۸ GHz
Antenna Diameter: ۱.۲ meters
Efficiency (η): ۶۵%
Gain = 10 log₁₀(۰.۶۵ (π × ۱.۲ × ۰.۰۱۶۷)²) ≈ ۴۲ dBi
📌 Antenna Specifications Table:
| Description | Value | Parameter |
|---|---|---|
| Suitable for a distance of 150 kilometers | ۴۲ dBi | Gain |
| High targeting accuracy | ۱.۸° | 3dB Angle |
| Resistant to wind and rain | Anodized Aluminum | Reflector Material |
Link Stability Calculation (Availability)
📉 Examining Signal Attenuation Factors:
Atmospheric Loss: 0.۱ dB/km
Rain Fade: 15 dB (based on regional meteorological data)
Multipath: ۳ dB
📌 Fade Margin Calculation:
FM = Ptx − Losstotal − Sensitivityrx
FM = 28 dBm − (۱۵۰ × ۰.۱ + ۱۵ + ۳) − (−۸۸) = 93 dB
و در انتها: ایران مایکروویو، پس از حضور در محل و بررسی کامل مشکل، تمامی عملیات لازم را برای شما انجام میدهد تا با کمترین هزینه، فعالیت خود را بطور کامل انجام دهید.
برای تماس با دپارتمان مشاوره و طراحی لینک مایکروویو و پروژههای مخابراتی فرم زیر را تکمیل و برای ما ارسال کنید:
And at the end: Iran Microwave, after visiting the site and thoroughly examining the problem, will perform all the necessary operations for you so that you can fully carry out your activities at the lowest cost.
To contact the consulting and design department for microwave links and telecommunications projects, please complete the form below and send it to us