The Opportunities and Challenges of LTE Unlicensed in 5 GHz
David Witkowski, Executive Director, Wireless Communications Initiative
In 1998, the Federal Communications Commission established the Unlicensed National Information Infrastructure or U-NII 5 GHz bands. These are used primarily for Wi-Fi networks in homes, offices, hotels, airports, and other public spaces and also consumer devices. U-NII is also used by wireless Internet Service Providers, linking public safety radio sites, and for monitoring and critical infrastructure such as gas/oil pipelines.

MMD March 2014

Previous issues click here


Band Reject Filter Series
Higher frequency band reject (notch) filters are designed to operate over the frequency range of .01 to 28 GHz. These filters are characterized by having the reverse properties of band pass filters and are offered in multiple topologies. Available in compact sizes.
RLC Electronics

SP6T RF Switch
JSW6-33DR+ is a medium power reflective SP6T RF switch, with reflective short on output ports in the off condition. Made using Silicon-on-Insulator process, it has very high IP3, a built-in CMOS driver and negative voltage generator.

Group Delay Equalized Bandpass Filter
Part number 2903 is a group delayed equalized elliptic type bandpass filter that has a typical 1 dB bandwidth of 94 MHz and a typical 60 dB bandwidth of 171 MHz. Insertion loss is <2 dB and group delay variation from 110 to 170 MHz is <3nsec.
KR Electronics

Absorptive Low Pass Filter
Model AF9350 is a UHF, low pass filter that covers the 10 to 500 MHz band and has an average power rating of 400W CW. It incurs a rejection of 45 dB minimum at the 750 to 3000 MHz band, and power rating of 25W CW from 501 to 5000 MHz.

LTE Band 14 Ceramic Duplexer
This high performance LTE ceramic duplexer was designed and built for use in public safety communication and commercial cellular applications. It operates in Band 14 and offers low insertion loss and high isolation to enable clear communications in the LTE network.
Networks International

See all products in this issue

August 2014

Anritsu Vector Signal Generator/Signal Analyzer Solution Addresses LTE-Advanced Carrier Aggregation Test Requirements
By Patrick Weisgarber, Anritsu Company

LTE-Advanced, unveiled by 3GPP Release 10, incorporates Carrier Aggregation (CA) to address the spectrum congestion associated with the increased use of rich applications by a growing number of consumers. It also addresses the need for backward compatibility by using LTE Release 8 and Release 9 carriers as basic building blocks.

While LTE-Advanced CA was developed to solve the dilemma of increased user expectations for ubiquitous coverage, instantaneous response and bandwidth on demand, it has created testing challenges for engineers designing User Equipment (UE) and base stations. Anritsu Company addresses these challenges with flexible test solutions specifically developed for evaluating the performance of devices that implement LTE-Advanced CA technology.

Figure 1: The MS269xA series spectrum analyzers/signal analyzers integrate vector signal analysis and vector signal generation in a single instrument

Spectrum/Signal Analyzer
The MS269xA (Figure 1) series of spectrum/signal analyzers consists of three models—the MS2690A/MS2691A/MS2692A—that provide frequency coverage up to 26.5 GHz. The MS269xA delivers unique versatility to engineers by combining high-performance vector signal analysis and full-featured vector signal generation into a single instrument. The series features the high dynamic range and low distortion necessary for LTE-Advanced CA device validation. A patented multipoint amplitude and phase calibration process enables a best-in-class level accuracy of ±0.5 dB throughout the LTE-Advanced operating bands, eliminating the need for a RF power meter in many cases.

To simplify the testing of LTE-Advanced components and devices, the MS269xA incorporates a variety of automated spectrum measurements, including channel power, occupied bandwidth, Adjacent Channel Leakage Ratio (ACLR) and Spurious Emissions. The instrument also offers comprehensive LTE-Advanced FDD and TDD modulation measurements, including Error Vector Modulation (EVM), frequency error, timing error and subcarrier power for every subframe, resource block and symbol within an LTE signal.

The MS269xA enables easy, one-button evaluation of up to five Component Carriers (CC) across up to three RF bands of 125 MHz each, making it suitable for any current or proposed LTE-Advanced CA scenario. The signal analyzer can accommodate any combination of Intraband Contiguous, Intraband Non-contiguous and Interband Non-contiguous Component Carriers and displays all measurement results on a single screen (Figure 2).

Figure 2: Intraband Contiguous, Intraband Non-contiguous and Interband Non-contiguous Component Carrier measurement results can be shown on a single MS269xA display

An optional vector signal generator in the MS269xA provides coverage up to 6 GHz and features a modulation bandwidth of 120 MHz, making it suitable for modeling any current or proposed Intraband Contiguous and Non-contiguous CA scenario. Integration of the vector signal generator in the MS269xA allows engineers to use a single instrument for Tx/Rx stimulus/response and gain/distortion testing on LTE-Advanced devices and components.

Figure 3: Anritsu’s MG3710A vector signal generator is uniquely suited for LTE-Advanced CA testing

Vector Signal Generator
The MG3710A vector signal generator (Figure 3) offers coverage to 6 GHz and provides the high output power and spectral purity required for LTE-Advanced CA testing. With dual RF output ports and dual memories for each port, the MG3710A can generate up to four independently modulated 120 MHz bandwidth signals—each of which may be tuned in frequency and amplitude.

Engineers can use the multi-signal generation capability of the MG3710A to test LTE-Advanced devices and components. One MG3710A can simulate up to 20 CCs across two frequency bands, enabling it to model any current or proposed Intraband Contiguous, Intraband Non-contiguous and two-band Interband Non-contiguous CA scenario. When combined with the vector signal generator in the MS269xA, the two instruments can model even the most complex scenario proposed for LTE-Advanced: five CCs across three bands.

The MG3710A can generate the high-purity LTE-Advanced signals required for characterizing the gain and distortion of components, such as amplifiers, duplexers, mixers and antenna switch modules, used in LTE-Advanced base stations and UE.

The MG3710A supports all required base station and UE receiver tests, including In-Channel and Adjacent Channel Selectivity; In-band, Out-of-Band and Narrow Band Blocking; and Spurious Response, Intermodulation and Receiver Image Rejection. A wide range of 3G and 4G reference waveforms enables the MG3710A to be used for Co-location and Co-Existence testing used in LTE-Advanced base station and UE.

Software Simplifies LTE-Advanced CA Testing
Anritsu’s IQproducer™ software simplifies the generation of customized waveforms. IQproducer enables the user to easily configure and create complex LTE-Advanced FDD and TDD CA signals via an intuitive user interface.

Figure 4: The Easy Setup mode of the IQproducer software

Figure 4 shows the Easy Setup mode of IQproducer. Key CC parameters can be confirmed via a list display, and the bandwidth, Cell ID, frequency offset, and E-UTRA Test Model can be set for each CC. A Normal Setup mode supports more detailed settings.

Carrier Aggregation is a key LTE-Advanced technology, offering faster and larger capacity mobile services over a wider coverage range. However, the multi-signal environment inherent to CA introduces complexity to evaluating and characterizing LTE-Advanced devices. The Anritsu MS269xA spectrum/signal analyzers and MG3710A vector signal generator comprise a versatile two-box solution that can handle the most complex LTE-Advanced CA signal analysis and generation—as well as every other common 3G and 4G wireless technology.

Anritsu Company
Email this article to a friend!


You Can
Search by Number:

  All ads, articles, and products in printed issues of MPD have a number. Just look for the red arrow in the ad or at the end of the article or product description.


Uncertain Times for DefenseWill OpenRFM Shake Up the Microwave Industry?
By Barry Manz

Throughout the history of the RF and microwave industry there has never been a form factor standardizing the electromechanical, software, control plane, and thermal interfaces used by integrated microwave assemblies (IMAs) employed in defense systems. Rather, every system has been built to meet the requirements of a specific system, which may be but probably isn’t compatible with any other system. It’s simply the way the industry has always responded to requests from subcontractors that in turn must meet the physical, electrical, and RF requirements of prime contractors. Read More...

Home | About Us | Archives | Editorial Submissions | Media Kit (PDF) | Events | Subscribe/Renew | Contact Us
Copyright © 2014 Octagon Communication Inc. DBA MPDigest /, All Rights Reserved.
Privacy Policy | Site Map