5G Antenna Systems - AM Sessions
9:00 AM CST
Dr. Benoit Derat, Senior Director of Engineering - Rohde & Schwarz
Prof. Corbett Rowell, Senior Development Expert in OTA and Antenna Measurement - Rohde & Schwarz
Bringing active beam-forming technologies to the mass-market application of mobile telecommunications, 5G millimeter-wave (mmW) is fostering R&D in over-the-air (OTA) testing techniques. At such high frequencies, wireless devices can be as large as several tens of wavelengths, therefore imposing large distances for far-field performance evaluation. In order to limit space and cost constraints, the industry has largely focused on testing methodologies based on compact antenna test range (CATR), because of its high quiet zone efficiency.
Since its invention in the late sixties, CATR technology has been widely and successfully applied to the measurement of electrically large antennas. The test requirements in OTA and high accuracy antenna measurements are however quite different, and new CATR-based concepts are emerging which are breaking classical rules of compact range design. This talk aims at introducing the latest innovations in CATR technology which have been driven by solving 5G mmW OTA-related problems. This includes vertical and extremely short focal length compact ranges, as well as multi-reflector setups optimized for creating a plurality of angle of arrivals, reproducing mobile network conditions.
9:45 AM CST
MIMO, the advanced technology that employs parallel data streams to enhance capacity, is touted as a lifesaver for 5G deployments as mobile operators densify their networks. Most of the MIMO currently deployed uses two (2x), four (4x) or eight (8x) data streams, but some use cases call for Massive MIMO, which uses 16-64 separate transceivers. What’s the best approach?
While some manufacturers tout Massive MIMO as a cure-all for 5G deployments, the reality is that only 10-15 percent of cell sites need the kind of capacity it delivers. For the majority of sites, ‘regular’ MIMO is fine. In addition, there are a number of downsides to Massive MIMO (i.e., cost and power requirements) that disrupt the business case for using it everywhere. In this presentation, the speaker will compare and contrast MIMO and Massive MIMO to give listeners a solid perspective from which to consider these two technologies. The presentation will cover the following topics:
MIMO versus Massive MIMO technology
Network capacity needs
11:15 AM CST
Implementing Massive MIMO for 5G
Ali Ozgur Yilmaz, Ph.D., President - Anketek Inc.
Starting with 4G, the RF and baseband functionalities have been split in order to enable higher flexibility and possible reduction in equipment and maintenance costs. One very important component in 5G networks is the remote radio unit (RRU) which was defined and made use of in 4G networks as well. Anketek is responsible of designing a RRU which carries analog front end circuitry and part of baseband processing integrated with an active antenna system.
The talk will start with describing the Split 7.2 option that has been our choice in RRU design. We will later talk about the hardware components needed for the various functions in the RRU. A key issue is supporting massive MIMO capability for cost-conscious service providers. The talk will cover how to move from 16T16R systems with 16 RF chains to 64T64R systems with 64 RF chains and further in cost- effective manner. The talk will conclude with comments on further improvements in new 5G releases and how our designs will cope with them.
11:45 AM CST - 1:00 PM CST
5G Antenna Systems - PM Sessions
1:00 PM CST
Mohamed Sanad, Founder - Amant Antennas
Hasham Yamani, Ph.D - University of Nevada, Reno
A multi-beam base station antenna has been developed using dual parabolic cylindrical reflectors. It can generate an arbitrary number of beams, which significantly increases the capacity and reduces the need for spatial multiplexing MIMO. The ±45° polarization feeds can be replaced by single-port orthogonally polarized feeds, which significantly reduce the need for spatial diversity MIMO. Each beam can be remotely-electrically-tilted with an arbitrary vertical tilt angle. So, the antenna can cover a circle of an arbitrary diameter. Alternatively, it can cover any set of sectors having arbitrary shapes and sizes by remotely controlling the vertical tilt angle of each beam individually.
On the other hand, BTS transceivers have two ports for ±45° polarizations. Alternatively, the two ports of the transceiver can be connected to two different beams above each other. This can be achieved by generating two sets of beams above each other such that the peaks of the upper beams are above the nulls of the lower beams. Thus, with only two-port transceivers, the system will be equivalent to 4x4 MIMO combining both polarization and space diversities. The space diversity is due to the separation between the feeds of the two beams which are above each other. The polarization diversity is due to the single-port orthogonally polarized feeds.
Furthermore, power combiners/splitters can be used to combine the multi-ports of the multi-beam base station antenna into any arbitrary number of ports. For example, the ports of the hexa-beam antenna can be combined together to convert it into a triple-beam, a twin-beam or even a single-beam antenna with 60o beam-width but with 20-24 dBi gain instead of the 17-18 dBi gain of conventional single-beam base station antennas. So, the gain will be significantly increased without any modifications in the current transceivers and, moreover, the configuration will be equivalent to 4x4 MIMO.
1:30 PM CST
Dr. Ganesh Sundaram, CEO - AlefEdge
Tremendous innovation has taken place in software-defined technologies to enable 5G infrastructure, but a significant piece of the puzzle will come from the Software-Defined Mobile Edge (SD-ME) to bring commercial services to market rapidly. With SD-ME, enterprises will soon have an opportunity to instantly integrate the Edge into their network creating a shift from network engineering to network programming. Enterprises can consume services in minutes with a platform that is access neutral, cloud-neutral, and application neutral. Coupled together by the right combination of open Edge APIs, the Edge Ecosystem can bring new and enhanced capabilities to the 5G marketplace, and in particular the antenna industry.
During this presentation, Ganesh Sundaram–CEO of AlefEdge– will discuss:
How CIOs can catalyze their enterprise rollout of digital transformation seamlessly.
How enterprises can leverage the power of the cloud and the Edge simultaneously.
The role of SD-ME in enhancing security in the context of the mobile enterprise
Live use cases for the Edge and defining the "Killer App"
Where innovation on the Edge Internet is still to come and the criticality of next generation antenna technologies
2:00 PM CST
Tayfun Özdemir, Ph.D., President/CTO - Monarch Antenna, Inc.
The 5G communication infrastructure and the protocol have many features to support many applications other than personal communications and many devices (in addition to handsets). Therefore, it is important to understand what aspects of the 5G standard are relevant to the handsets and recognize that the handset antennas are at the end of the food-chain that includes the I/O peripherals, baseband processor and RF Front End, to name the major components. This requires a good understanding of the 5G world and hence the talk will start with explaining the standard, its intended purpose and the features relevant to the handsets and the handset antennas, in particular.
The talk will then dive into the 5G backhaul, tower radios and the tower antennas because handset is part of this ecosystem. This will be followed by the review of handset radios and antennas because the functions of the radio determine the handset antenna requirements such as radiated emission, pattern, gain, VSWR, form-factor and interference. While doing so, fundamental limits on antenna performance as well as research on pushing these limits will be presented. The presentation will cover those antennas that provide 5G connectivity among the handset, the tower or the mico-cell (i.e., cellular), and other 5G enabled devices (i.e., Machine to Machine) but will exclude antennas that serve other connectivities such as GPS, WiFi, Bluetooth, RFID, Near Field, FM, and TV. The talk will conclude with designs for consideration.
2:30 PM CST
Ahmed Hmimy, PhD, Director, DCCS Solutions Architect - CommScope
Mobile operators need to deliver 5G signals indoors, and that means deploying distributed antenna systems (DAS). However, 5G-capable DAS must support multi-frequency service layers as 5G technology evolves from low-band to mid-band to millimeter wave wireless. The challenge is to support these evolutions without unnecessary costs, re-architecting the DAS or adding more fiber fronthaul to the deployment.
In this presentation, the speaker will discuss key requirements for supporting indoor 5G evolution with DAS, and will lay out scenarios that make DAS deployments efficient and cost-effective. The presentation covers the following topics:
5G frequency evolution
Need for DAS to support 5G inside buildings
Challenges of supporting 5G as frequencies evolve
How to evolve DAS without adding head-end hardware or more fiber
3:00 PM CST
Dr. Apostolis Sotiriou, Assistant VP Telecom Sales North America - Raycap
The 5G wireless infrastructure needed will comprise from six to 12 times more cell sites than earlier generations. Moreover, the service providers will need to locate more small cells where there are more people and businesses, creating densification challenges for city planners trying to uphold municipal aesthetics and public safety.
This is a new problem for urban planners, and for the utilities that maintain much of the street-level poles and structures. Even though they are smaller than the familiar macro cell sites, 5G small cell sites include antennas, electronics, cabling and enclosures that may not fit into the architectural aesthetic of the street and may appear to clutter up the airspace immediately overhead.
This presentation will highlight how to address the challenge in a number of ways including:
Concealing small cell 5G antennas without impacting signal
Making it robust enough to withstand the elements such as UV, thermal, water, and flame resistant.
Giving it a flexible form factor to be backwards and forwards compatible with antennas
3:30 PM CST
Dr. Raja Mir, Design Engineer - NOKIA
Implementation principles are proposed, and a comparison of linearization solutions is presented for multi-beam antenna arrays driven by multiple mmWave 5G power amplifiers. The implementation of the feedback portion in a digital predistortion (DPD) system for an array of power amplifiers (PA), which are configured to operate either as one array or as multiple sub-arrays, is shown to be critically important in determining the overall performance of the beamformed transmitter. The proposed feedback solution, based on combining the outputs of multiple PAs in a passive structure embedded in the transmitter’s printed-circuit board (PCB), is shown to be effective in the realization of the DPD system of the beamformed transmitter.
Even though mmWave 5G technology is in its preliminary of deployment, the R&D has started to speculate about the nature of 6G technology.