Next-Generation Mobile Communication 5G

Next-Generation Mobile Communication 5G

Currently, each telecommunications field company is developing products to realize next-generation mobile communication 5G.
This next generation mobile communication standard 5G has the following three features.
1. High-speed large capacity
2. Low latency
3. Simultaneous connection of multiple terminals
We will develop a communication network that will satisfy all of these and start services sequentially. It is not yet decided how to operate with respect to simultaneous multiple terminal connections.
So far Japan has been proceeding with this roadmap to develop this 5G facility targeting the time of the 2020 Tokyo Olympic Games.
However, at the Mobile World Congress (MWC) held in Spain (Madrid) in February 2018, it was announced that mobile communication carriers and communication equipment manufacturers in each country will start commercialization of 5 G communication in 2019, It is necessary to aim at the commercialization of the same operators in various regions including the company ahead of schedule.
Commercialization experiments are planned in the United States and China in 2019 and commercialization experiment in Europe in this year from 2018. The goal of the commercial launch in 2020 in Japan has not changed so far in Japan, but it is also fully conceivable that the start of services will be accelerated due to the influence of other countries.

Changes and improvements in such communication standards will affect not only changes in fields that are limited to mobile communications like 3G to 4G, but also to all devices that can be connected by IOT.
As a simple example, it is expected to be utilized in the following fields.

Video distribution (4K, 8K)
Medical (remote control)
Automobile (automatic driving control)
Robot control (remote control)
Security service (remote monitoring control)
Amusement (video, VR experience)

High speed large capacity communication

High-speed large-capacity communication at 5 G is a communication that can communicate at 20 Gbps at the maximum, about 25 times the maximum of 800 Mbps currently used at 4 G to enable this high-speed and large capacity communication, used in Japan a lot Compared to LTE (3.9 G, currently being interpreted as 4 G in Japan) it is necessary to enable about 100 to 1000 times communication.
Therefore, while using the current 3G and 4G lines, a new communication band: 6 GHz band is used.
This will use higher frequencies than the 5 GHz band used in 2.4 GHz, 11 a, 11 b of the conventional WiFi standard 11 g, 11 b. This 11ac is practically used at a communication speed of 6.9 Gbps, which is about 11.5 times higher than the conventional 11n (the standard that can be used at both 2.4 GHz and 5 GHz).
If you are using a Wifi router at home and you are communicating with the communication standard 11ac, 11ac’s 5 GHz band communication is used in many devices 2.4 GHz band from other devices Although there is no interference, the communication sensitivity of WiFi leaves the WiFi antenna and there is an obstacle directly between the antenna and the mobile terminal, or there is a case that I felt a decrease in communication sensitivity occurring when moving to another room I think. Although increasing the communication frequency keeps straightforwardness, it is impossible to ignore the influence of obstacles and attenuation of communication capacity due to distance.
In order to solve this problem, it is necessary to improve the antenna technology (directivity, beam division multiplexing, use of millimeter waves) to linearly connect the antenna and each mobile terminal, and to increase the number of antenna elements (more than 100 Antenna element), it is necessary to increase the number of base stations themselves, in addition to increasing the antenna controlled by the current one base station to more than 100.

The significant increase in the number of base stations

Although the range covered by the base station at 4 G is about 1 km in radius, the interval between the base stations is calculated to be about 100 m to 200 m in the realization of 5 G, and the base station greatly increases (about 4 to 18 times as calculated) Is required.
Regarding the substantial increase in base stations, whether each type of mobile communication provider will set themselves as before or as common as Korea 4 companies (KT & LGU + & SK Telecom & SK broadband) set up a common base station and mutual use It is currently under consideration in many countries about whether to do.

Low latency

It is decided that the network delay standard in 5G will be 1.0ms or less.
This is a remarkable reduction of delays in current mobile terminals, taking into consideration applications to medical practices, automated driving techniques of automobiles, remote control of robots, etc.
Even in areas where it has been difficult to handle with mobile communication up to 4G, it will lead to technological innovation to many more fields by using this 5G network.
However, in the case of communicating in the order of the conventional terminal, antenna (base station), optical line, server, optical line, antenna (base station) and terminal, the network delay time is 0.5 ms, there is a possibility that a delay of 1.0 ms or more may occur, so communication in the same area will be handled by completing communication by placing a server in the antenna (base station) I will.

Simultaneous connection of multiple terminals

Even when there are many terminals within a certain range, it is necessary to create a mechanism that does not cause communication speed, capacity, and delay. As mentioned above, although we do not know how each company clears this mechanism for this simultaneous multi-terminal connection at present, it is premised that one million crisis per 1 km 2 can be connected to the communication line at the same time.

Method of communication

Construction of a communication network utilizing VSAT (low orbit satellite) as well as communication using optical lines
Although it seems that communication of high speed and large capacity will be performed using the 4G line up to now using the optical line as it is, for the area where the optical line has not arrived, VSAT (low orbit satellite) communication It is also considered to make connections by utilizing them.

The current situation in Japan
The current communication used by the Japanese is considerably proportional to the optical line reaching the home, or the Internet connection using the cable TV line has become widespread, there is not much trouble with the slow communication line. This can be said that there are environments in which it is relatively easy for laying of optical lines and cable television lines from areas with large land such as the United States and China due to the small national land of Japan. Also regarding the cellular phone, the communication using the current 4G line can be handled without problems in a considerable area where the population coverage rate is over 90%, so even opinions like whether the change to 5G is really necessary is heard.
Regarding video (television), 4K and 8K television are currently being released from each manufacturer one after the other in Japan, and many are on the shop front. However, the current Japanese television broadcasting does not deliver 4K and 8K, and even if you purchase 4K, 8K compatible television, it will not benefit from that. Moreover, with the 4K, 8K TV built-in devices currently being sold, it is not possible to display the 4K, 8K distribution that will start in the future, and it is in a state that it is impossible to understand that it is necessary to install new equipment separately in each household.

Our product correspondence
We develop and sell the following products corresponding to 5G next-generation communication standards.
We can offer optical communication products and VSAT products to sequentially shift to 5G via 4.5G using the current 4G communication network.

For base station main unit
Low Phase Noise VCXO 122.880 MHz
Crystal Resonator for Discrete Crystal Filter

UM-1 Fundamental Mode Crystal Unit  122.400 MHz band, 75.000 MHz band, 151.000 MHz band, etc.

VSAT Components Parts
Ku-band C-band VSAT BUC LNB etc.

We will post the product details one by one.
If you have any inquiries about the product, please contact our sales department.

Contact

 

 

 

 

 

 

The Reliability of VSAT Components(Total Cost Consideration)

posted in: Microwave Components | 0

Reliability of communication equipment is a very important item for communication management company and management company.
Currently the fact that communication systems are always in continuous connection has become a norm.
It is a well-known fact that the loss in the event of the system stopping temporarily damages the company’s survival.
The useful life of communication equipment has long been long, and along with that it is required to have a small fault establishment.

Malfunction
Basically two types of failure are classified as follows.
1) The operation of the entire product for executing the function has been stopped.
2) The operation as a product as a whole continues, but essential functions of some elements can not be executed.
However, even if it says universally a failure, there are various factors such as initial failure of components, accidental failure depending on the environment such as weather, failure due to aged deterioration, design mistake at the design stage, malfunction due to human error due to operator etc. Factors are considered.

Reliability
Reliability is defined in IEEE 90 as follows.
Reliability is the ability of a system or component to operate essential functions under specified conditions for a specified period of time.
In other words, it is the prospect that the system and components will operate for a certain period of time without failure.

MTBF
MTBF (Mean Time Between Failure) aims at system reliability Basically it is the scale and the unit is time.

The higher the MTBF value is, the more reliable the product is.
Reliability = e (- time / MTBF)
The basic prerequisite for analyzing the MTBF of the system is that in the case of an electronic system with a small number of moving parts such as the VSAT system, the wear failure period does not become faster so that it is generally standard operation during the service life The failure rate of the component during the period is assumed to be constant, and the failure rate curve like the following bathtub curve will be drawn.

Bathtub curve

MTBF of NJRC product
Although the MTBF for NJRC VSAT Components varies according to each type,
Currently calculated values ​​are as follows.
C-band BUC   1.39 – 4.33 * 105 hours @ + 55 deg C
C-band LNB    6.65 – 7.07 * 105hours @ + 60 deg C
Ku-band BUC 1.28 – 4.33 * 105hours @ + 55 deg C
Ku-band LNB  9.23 * 105– 3.41 * 106hours @ + 60 deg C

Both figures are very high, indicating that the product’s reliability is high.
If you need detailed numerical values ​​for each model, please contact our sales department.

Total Cost Consideration

Cost is also an important concern. Although the cost of the communication system is the initial cost plus the operation expenses, the increase in costs due to the breakdown included in this operation cost is a risk that you want to avoid as a system management company. As for the breakdown after the warranty period of the product, the system operating company will respond each time, but as the failure time is late, the overall cost will be cheaper as a matter of course, so the management company will take that into consideration It is necessary to design the system considering the reliability including MTBF of each constituent product (manufacturer).

*Specifications, designs and service contents described are subject to change without notice. Please confirm the details to our sales.*

VSAT Components Contact

Ku-band 4W BUC NJT8304series

posted in: Microwave Components | 0

We would like to introduce you NJRC Ku-band 4W Block Upconverter(BUC).

Model Number: NJT8304

 

RF Frequency: Universal Ku-band (13.75 to 14.5GHz), Standard Ku-band (14.0 to 14.5GHz)

High Efficiency Output Power: P1dB: +36.0dBm min. over temperature

ACPR: -29dBc typ. -26dBc max. @Pout=+35.5dBm,

Power Consumption: 28W typ. 32W max.

Dimension & Weight: 98mm(L)x98mm(W)x42.5mm(H),0.5kgs

RoHS Compliance

Model No.RF
Frequency
Local
Frequency
IF
Frequency
Output Power
@ P1dB
IF
Connector
NJT8304UN13.75 to 14.5 GHz
(Universal Ku-band)
12.8 GHz950 to
1,700 MHz
4W Linear
(+36.0 dBm min.)
N-type
NJT8304UFF-type
NJT8304N14.0 to 14.5 GHz
(Standard Ku-band)
13.05 GHz950 to
1,450 MHz
N-type
NJT8304FF-type

 

The ACPR of the NJT 8304 series is -29 dBc typ. -26 dBc max, which is improved compared with the conventional product NJT 5207 series (-26 dBc typ. -23 dBc max).

Linear Gain is also + 37.8 dBm a@ P1dB, improved by + 0.3 dBm.

In addition, the power consumption is 28W typ. 32W max. and this power consumption has been reduced from 5 to 9 W from the previous model.

Regarding the external dimensions and weight, reduction of 70% compared to conventional products was done, and the weight was 0.5 kgs.

If you are interested in this Ku-band 4W BUC, please feel free to contact our sales department.

 

*Specifications, designs and service contents described are subject to change without notice. Please confirm the details to our sales.*

VSAT Components Contact

Ku-band 6W BUC NJT8306series

posted in: Microwave Components | 0

We would like to introduce you NJRC Ku-band 6W Block Upconverter(BUC).

Model Number: NJT8306

RF Frequency: Universal Ku-band (13.75 to 14.5GHz), Standard Ku-band (14.0 to 14.5GHz)

High Efficiency Output Power: P1dB: +37.8dBm min. over temperature, ACPR: -30dBc @Pout=+37.8dBm, Power Consumption: 40W

Dimension & Weight: 174.9mm(L)x84mm(W)x59.2mm(H),1.2kgs

RoHS Compliance

Model No.RF
Frequency
Local
Frequency
IF
Frequency
Output Power
@ P1dB
IF
Connector
NJT8306UN13.75 to 14.5 GHz
(Universal Ku-band)
12.8 GHz950 to
1,700 MHz
6 W Linear
(+37.8 dBm min.)
N-type
NJT8306UFF-type
NJT8306N14.0 to 14.5 GHz
(Standard Ku-band)
13.05 GHz950 to
1,450 MHz
N-type
NJT8306FF-type

 

The NJT 8306 series also covers the Universal Ku-band which was not supported by the previous models.
Linearity is also + 37.8 dBm a@ P1dB, improved by + 0.3 dBm.
In addition, the power consumption is 40 W and this power consumption has been reduced from 15 to 23 W from the previous model.
Outline reduction is also done in terms of size and weight, which is about a half of 1.2 kg in weight.

If you are interested in this Ku-band 6W BUC, please feel free to contact our sales department.

 

*Specifications, designs and service contents described are subject to change without notice. Please confirm the details to our sales.*

VSAT Components Contact

 

 

VSAT Components 2017-2018 Line-ups Alteration

posted in: Microwave Components | 0

We would like to show you NJRC VSAT Components Line-ups 2017-2018.

We will introduce about this alteration.
1. C-band BUC
C-band 8 W BUC is available only for Standard C-band BUC.
3W BUC and 2W BUC are compact models as the main products and the conventional model is discontinued.
However, for 2W BUC (Palapa C-band) it will be compatible with Full C-band product.
(2 W BUC (Insat C-band) are available with conventional products.)

2. Ku-band BUC
Ku-band 6W BUC has slim type as the main product and the conventional model is discontinued.
4W BUC also has a compact model as the main product and the conventional model is discontinued.

3. Ku-band LNB
Ku-band DRO LNB (+/- 900 KHz, +/- 500 KHz) will be discontinued and will be compatible with Ku-band 2 LO PLL LNB.

Please refer to the correspondence table for detailed correspondence.

TypeOld Model(Discontinued Model)New Model (Current Model)
C-band 8W BUCNJT5761NJT5760(Standard C-band)
C-band 3W BUCNJT5679NJT8103
C-band 2W BUCNJT5667(standard C-band)NJT8102
C-band 2W BUCNJT5674(palapa C-band)NJT8102
Ku-band 6W BUCNJT5127NJT8306
Ku-band 4W BUCNJT5207NJT8304
Ku-band 4W BUCNJT5307NJT8304
KU-band DRO LNBNJR2144 2154 2184NJR2841 2842 2843 (2LO PLL)
Ku-band DRO LNBNJR2744 2754 2784NJR2841 2842 2843 (2LO PLL)

(Please note that discontinued items and new products may be changed without notice.)

As for discontinued items, only correspondence can be made with the current inventory and inventory parts, so please contact our sales department.

VSAT Components Contact

 

Ku-band GaN 40W robust-BUC NJT8371series

posted in: Microwave Components | 0

We would like to introduce you NJRC Ku-band 40W Block Upconverter(BUC).

This BUC is using GaN Technology Amplifier.

Model Number: NJT8371

RF Frequency: Universal Ku-band (13.75 to 14.5GHz), Standard Ku-band (14.0 to 14.5GHz)

High Efficiency Output Power: Saturation Output Power=+46.0dBm, ACPR: -30dBc@Pout=+44.0dBm, Power Consumption=260W

AC Power Operation (Option available)

Monitor & Control Option: FSK Communication M&C, RS-232C Interface Serial M&C

Compact Size & Light Wieght: 230mm(L)x150mm(W)x100mm(H), 4.2kg

RoHS Complliance

Model No.RF FrequencyLocal FrequencyIF FrequencyOutput PowerIF ConnectorPower SupplyM&C
NJT8371NMK14.0 to 14.5 GHz (Standard Ku-band)13.05 GHz950 to 1,450 MHz40W Saturation (+46 dBm)N-typeDC Power applied on MS ConnectorFSK M&C
NJT8371FMKF-type
NJT8371NMRN-typeRS-232C M&C
NJT8371FMRF-type
NJT8371NMKAN-typeDC Power supplied by AC/DC PSUFSK M&C
NJT8371FMKAF-type
NJT8371NMRAN-typeRS-232C M&C
NJT8371FMRAF-type
NJT8371UNMK13.75 to 14.5 GHz (Universal Ku-band)12.8 GHz950 to 1,700 MHzN-typeDC Power applied on MS ConnectorFSK M&C
NJT8371UFMKF-type
NJT8371UNMRN-typeRS-232C M&C
NJT8371UFMRF-type
NJT8371UNMKAN-typeDC Power supplied by AC/DC PSUFSK M&C
NJT8371UFMKAF-type
NJT8371UNMRAN-typeRS-232C M&C
NJT8371UFMRAF-type

If you are interested in this 40W BUC, please feel free to contact our sales department.

 

*Specifications, designs and service contents described are subject to change without notice. Please confirm the details to our sales.*

VSAT Components Contact