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Comparison of point-to-point solutions based on MikroTik RouterBoards in the standard of 802.11n

Comparison of point-to-point solutions based on MikroTik RouterBoards in the standard of 802.11n
Test research
May 26th, 2015

The aim of that comparison is to show alternative solutions in the group of point-to-point devices for low-cost products like SEXTANT (RBSEXTANTG5HPnD). On the market there is not too much ready to use devices with medium antenna gain to create point-to-point connections. Devices like SEXTANT can be used also as the client device in places where SXT devices are too weak to achieve acceptable signal strenght.

The aim of that comparison is to show alternative solutions in the group of point-to-point devices for low-cost products like SEXTANT (RBSEXTANTG5HPnD). On the market there is not too much ready to use devices with medium antenna gain to create point-to-point connections. Devices like SEXTANT can be used also as the client device in places where SXT devices are too weak to achieve acceptable signal strenght.

RBSEXTANTG5HPnD (SEXTANT) is equipped with 18 dBi dual polarity PFTE teflon laminate antenna and RB911G-5HPnD. It’s integrated device ready to be installed, just plug the RJ45 PoE and start operating. In the box there is antenna with RB911G installed, power supply, RJ45 PoE adapter, plastic mounting system, steel mounting straps to attach antenna to a mast. The device is expected to create links up to 3-4km.

We are going to compare this device with the set equipped with WiBOX PA M5-20HV dual polarity PTFE laminate antenna (20 dBi) and RouterBoard RB911G-5HPnD.

RBSEXTANTG5HPnD
WiBOX PA M5-20HV/X + RB911G-5HPnD
  • + a bit smaller design
  • + easy installation
  • + easy access to radio PCB
  • + easy & fast mounting
  • + PTFE teflon laminate antenna
  • + integrated solution
  • + PSU included
  • + low price
  • - weak plastic mounting system
  • - mast mounting ONLY
  • - small installation compartment (RB711/RB911)
  • - no possibility to upgrade
  • - pigtails soldered to the antenna PCB
  • - weaker antenna in comparison with WiBOX PA M5-20HV/X (17-18 vs. 20 dBi)
  • - bad VSWR on horizontal polarization
  • - weaker gain on horizontal polarization (around 1-1,5 dBi)
  • - impossible antenna rotation (no possibility to align or change the polarization)
  • - steel mounting straps (low cost solution)
  • - the front of the enclosure is attached by flexible mounting clasps (after some operation time opening the enclosure will be impossible without breaking the clasps)
  • - no DC Ground
  • - splash-proof enclosure (not waterproof)
  • + PTFE teflon laminate antenna
  • + easy installation of attached device
  • + possibility to change to H/V in X version
  • + possibility of antenna rotation (90 deg) to change polarizations
  • + possibility to connect more antenna systems (up to 4 additional ports)
  • + DC Grounding in standard
  • + IP67 waterproof
  • + big installation compartment allows to change board inside (25 x 25 x 5 [cm]; 9,84’’ x 9,84’’ x 1,96’’ [inch]
  • + more gained antenna than SEXTANT
  • + constant VSWR and gain on both polarizations
  • + solid mounting system, U-Bolts in standard
  • + econo version with cable gland, standard version with RJ45 waterproof system
  • + detachable pigtails from the antenna PCB
  • + level on the back of WiBOX
  • + optionally back and side shielding
  • + mast and wall mounting possible
  • + high-quality product
  • - bigger design in comparison with SEXTANT
  • - Much heavier BOX (vs. SEXTANT)
  • - higher price (vs. RBSEXTANTG5HPnD)
  • - worse access to RB911G-5HPnD (or another radio board)

Tab 1. Advantages & disadvantages of RBSEXTANTG5HPnD and WiBOX PA M5-20HV/X.

Antenna & box parameters (antenna parameters given by the manufacturers):

Parameter

SEXTANT

WiBOX PA M5-20HV/X

Gain

18&18 dBi

20&20 dBi

Frequency range

5,17 – 5,825 GHz

5,1 – 5,9 GHz

Polarization

H&V dual polarity

H&V dual polarity or X polarity

Beamwidth H/V

16,8°/22,8°

16°/16°

VSWR

1,6:1

Max. 2:1

Connector

2 x MMCX pigtail soldered to antenna PCB

SMA + detachable pigtails (U.FL/MMCX/RP-SMA)

Waterproofing

No (splash-proof enclosure)

Yes (IP67)

DC ground

No

Yes

Shielding

No

Yes (optionally)

Antenna adjustment

No

Yes (60° H, 60°V) + a level gauge on the back

Additional slots

No

Yes (4 additional slots)

Tab. 2 Antenna system parameters.

On the table above we publish data given by the manufacturers, we share them here as the information are official for publish view.

Device parameters (RB911G-5HPnD):

CPU

Atheros AR9342 600MHz network processor

Memory

32MB DDR SDRAM onboard memory

Data storage

Onboard NAND memory chip

Ethernet

One 10/100/1000 Mbit with Fast Ethernet with Auto MDI-X

Wireless

5GHz 802.11a/n, 2x2 MIMO, 2x MMCX

Power

Power over Ethernet: 10..28V DC (except power over datalines). No

power jack. Up to 11W consumption.

Operation System

MikroTik RouterOS, Level3 license

Tab. 3 Data given by MikroTik.

Although the electronic device is the same, the antenna and box are different. In WiBOX system the antenna is more gained, the gain in working band is 20 dBi with VSWR

I. Mechanical Comparison

1) Dimensions

SEXTANT is a bit smaller than WiBOX medium enclosure.

Pic. 1 Comparison of WiBOX Medium and SEXTANT sizes.

2) Installation

Here SEXTANT is a bit better, because offers very quick installation, just slip plastic mounting bracket and mount it using steel mounting straps.

In WIBOX Medium there is a need to attach solid mounting system and mount it on a mast (U-bolts in standard) or a wall.

 

 

Pic. 2 Installation of WiBOX Medium and SEXTANT systems.

3) Mounting system

SEXTANT has smart plastic mounting bracket which needs to be sliped into the holder on the back side of system, then needs to be attached to the mast (only) by metal strips.

WiBOX Medium has solid fiber glass WiMount mounting system resistant for strong wind and corrosion. The WiMount needs to be attached by four screws to the antenna back side, then attached on a mast by U-Bolts or attached to a wall.

SEXTANT can be installed quicker than WiBOX Medium, but the low-cost mounting system is much weaker than WiMount.

Mast mounting parts

Main parts of mounting

 

 

Pic. 3 Comparison of mounting systems in WiBOX Medium and SEXTANT.


Pic. 4 Photo of both complete mountings.

4) Enclosure

We have compared the enclosured according to few targets like quality, usability, possibility of upgrading, etc.

 

 

 

 

 

 

Installation compartment

 

 

 

 

 

 

- possibility to change antenna and radio board with limited sizes

 

 

- 25 x 25x 5 cm space avalable to install any radio stuff

 

 

 

 

 

Access to PCB slots

 

- easy access to RJ45

 

- need to detach the front shield to get the board inside

 

 

 

 

 

Upgrade possibility

- some unspecified 2 holes for connectors, interior not prepared to install bigger boards with more than one radio

 

- 4 additional holes, big installation compartment, easy to adapt for new additional systems

 

 

 

 

 

Aligning

 

- left/right only

- left/right on U-bolts, left/right (+/- 30 deg) and up/down (+/- 30 deg), deg scale available

 

 

 

 

 

 

 

 

Details

- LED indicator

- RJ 45 access hole

 

- polarization indicator

 

 

- level gauge on the back

 

- dc ground connector

 

 

- anty-leak collar

 

Tab. 4 Comparison of important mechanical performances.

II. Antenna comparison

1. WiBOX PA M5-20HV
It’s dual polarity panel antenna, made using PTFE laminate and FR4 laminate, which ensures good performances in very wide frequency spectrum. The antenna has a gain of 20 dBi (manufacturer declares max gain of 20,5 dBi), operates in the operation band of 5,1 – 5,9 GHz.

PLOTS:
a) PORT 1

PORT 1/Polarization 1

PORT 1/Polarization 2

Pic 5. Radiation patterns of WiBOX PA M5-20HV – PORT 1
b) PORT 2

PORT 2/Polarization 1

PORT 2/Polarization 2

Pic 6. Radiation patterns of WiBOX PA M5-20HV – PORT 2

2. SEXTANT
SEXTANT is dual polarity panel antenna with a gain of 18 dBi (the manufacturer declares 17,51 dBi as max gain). It’s made of the combination PTFE laminate and FR4 as in WiBOX PA M5-20HV antenna. The operation band is 5,17 – 5,825 GHz.
PLOTS:
a) PORT 1

PORT 1/Polarization 1

PORT 1/Polarization 2

Pic 7. Radiation patterns of SEXTANT – PORT 1

b) PORT 2

PORT 2/Polarization 1

PORT 2/Polarization 2

Pic 8. Radiation patterns of SEXTANT – PORT 2

3. ANTENNA PARAMETER COMPARISON

Parameter

WiBOX PA M5-20HV/X

SEXTANT

Gain

20&20 dBi

18&18 dBi

Frequency range

5,1 – 5,9 GHz

5,17 – 5,825 GHz

Polarization

H&V dual polarity or X polarity

H&V dual polarity

Beamwidth H/V

16°/16°

16,8°/22,8°

VSWR

Max. 2:1

1,6:1

Connector

SMA + detachable pigtails (U.FL/MMCX/RP-SMA)

2 x MMCX pigtail soldered to antenna PCB

Port-to-Port Isolation

>32 dB in whole band

35 dB

DC ground

Yes

No

Tab. 5 Comparison of electrical antenna parameters.

III. SOLUTION CONTENTS

1. WiBOX PA M5-20HV/X + RB911G-5HPnD

WiBOX PA M5-20HV/X system comes with:

  • WiBOX PA M5-20HV/X
  • RB911G-5HPnD
  • 24V Power supply
  • PoE Injector
  • WiMount mounting system

2. RBSEXTANTG5HPnD

RBSEXTANTG5HPnD comes with:

  • SEXTANTG5HPnD unit
  • PoE Injector
  • 24V power supply
  • Mounting bracket
  • Steel mast mounting straps
Thursday, 17th August 2017

Informujemy, że w wyniku zapytania ofertowego na dostawę wtryskarki hydraulicznej z serwomotorem została wybrana oferta firmy:


MAPRO Polska Sp. z o.o.
ul. Złota 197,  42-202 Częstochowa
NIP 573-283-97-56 | REGON 242769954

Tuesday, 1th August 2017

W związku z realizacją projektu "Wdrożenie efektywnej energetycznie linii produkcyjnej anten telekomunikacyjnych” Wireless Instruments Sp. z o.o. zaprasza wszystkich zainteresowanych dostawców do składania ofert na dostawę wtryskarki hydraulicznej z serwomotorem. Kod CPV zamówienia: 42994200-2 - Maszyny do przerobu tworzyw sztucznych.