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Bree Engineering - 5G Technology Is All About
Opening a World of New Ideas
San Marcos, CA - September 20, 2018 - Bree Engineering, Inc., a leading manufacturer
of custom electronic filters, multiplexers, filter banks and other related types of components
in the frequency range of 0.1 MHz to 40 GHz, has published this whitepaper
titled, "5G Technology Is All About Opening a World of New Ideas."
5G technology is all about opening a world of
new ideas. With any new technology and its subsequent rollout, it's never just as simple
as just flipping a switch. At Bree Engineering we understand that, which is why we've
been working hard to gear up for 5G. We know that just as with 3G and 4G technology,
the RF path is crucial if 5G is going to deliver the speeds promised – which is projected
to be up to 10 times more data than the current 4G technology. One of the biggest tasks
with 5G is to create a way to fit all these big ideas into very small spaces, and that's
where Bree Engineering fits in.
The Vision of 5G – RF Filter Manufacturer
As designers and producers of RF filters, we recognize 5G is essentially a marketing
term for the wireless industry. What it boils down to for us is the huge demand 5G places
on a network and how we can help you to make it all fit together to deliver. We understand
the push-and-pull of the 5G market – that low-cost devices and an increase in the number
of connected devices conflicts with ultra-high reliability and increased data rates.
In fact, it's aggressive to expect a 5G target latency of less and one millisecond on
a cloud service with communication between the wireless device, access network, and core
network. But that's a challenge we are ready to take on by recognizing how our products
can help you to discover what you must overcome to achieve it.
Making 5G a Reality – RF Filter Manufacturer
One of the most exciting things about innovation is that out of it new technology
is born. When it comes to 5G, the number of filters, as well as the challenge of increasing
filtering requirements, will make RF filtering the pain point at the RF front-end. Luckily,
the basic outline to bring this technology to fruition is clear, including:
- Complex multiplexing
- Increasing integration
- Increasing the number of filters
- Demanding specifications for power handling, loss, and isolation
- Frequencies higher than 6 GHz
All this plainly shows that 5G is extremely complex, but our goal is to design
that are simple for you to use and will help you to minimize and reduce the components.
The filters we produce will help you to optimize power performance at a variety of temperatures,
and improve yield.
The Role of the RF Filter in 5G
In the world of 5G, the RF filter will be significant in the development process.
Currently, RF front-end separates the frequencies into low-band, mid-band, and high band,
which separates the RF components, optimizes the power amplifier-filter-switch-path,
and minimizes cross-talk. As things grow more complex with 5G, the intricacy of the RF
front-end will only increase. You must incorporate link robustness with increased downlink
data rates – and that's what our filters can help you develop and deliver.
Bree Engineering's Innovation
In order to address the behavior of the filter and prevent parasitic communication,
as well as ensure the performance of a Diplexer with the capability of maintaining rejection
out to 25 GHz can be maintained, we've fine-tuned techniques to physically alter
our assembly practices, placing shielding in specific locations to block out the passive
element communication. The orientation of the shields allows for the filter to meet design
specification out to 25 GHz. As you can see in Figure 1, there is a slight decrease
in the return loss as the frequency surpasses 17.5 GHz. For this particular filter,
the physical testing indicated parasitic communication around 14 GHz, causing issues
with the return loss and rejection that resulted in the passive element parasitic communication
that influenced the entire filter, which normally pushes the higher frequencies out of
the desired specification range.
But at Bree Engineering, our hands-on approach provides more valuable information
than a simple computer simulation. We've successfully designed a wide range of filters
to ensure the Diplexer performs accordingly. The return loss had a resulting average
throughout the pass band of 16 to 17 dB. The insertion loss was maintained to be
less than 0.75 (low side) and 1.00 (high side) through the entire filter performance.
Rejection was maintained but as the filter hit that 14 GHz point, the performance
dropped to 40 dB and above. Although this is not ideal, it was maintained through
the 25 GHz. Moving forward, the onus is on us to play our part in the creation of
technology that helps to reduce complexity, improve performance, and reduce cost. As
we said, it's a challenge, but one we're more than ready to meet. The future is now and
at Bree Engineering we want to have a front-row seat to help you develop the cutting-edge
technologies of the future.
Additional Technical Info:
– The difficulty in ensuring the performance of a Diplexer with the capability of
maintaining rejection out to 25 GHz, stems from the primary design schematic and
understanding that higher frequencies cause passive elements to behave sporadically.
Capacitors and Inductors begin to self-resonate as well as parasitically communicate,
altering the behavior of the filter.
– Some techniques that we have worked on to prevent this “parasitic communication”
is to physically alter our assembly practices such that shielding is placed in specific
locations to block out the passive element communication.
– The orientation and the location
of the shields, allow for the filter to meet design specifications out to 25 GHz.
– The Figure shows a slight decrease in the return loss as the frequency surpasses 17.5 GHz,
for this particular filter the physical testing displayed parasitic communication starting
around 14 GHz. Around that time the return loss and rejection began to cause problems
and the filters passive element parasitic communication influenced the entire filter.
– This event typically pushes the higher frequencies out of the desired specification
– The computer simulations cannot accurately show this behavior, so the experience
gained from a successful filter design is invaluable.
– Due to the wide range and necessity
for the Diplexer to perform accordingly, the Return Loss had a resulting average throughout
the pass band to be 16-17 dB. The Insertion Loss was maintained to be less than
.75 (Low Side) and 1.00 (High Side) through the entire filter performance. Rejection
was maintained but as the filter hit that 14 GHz point, the performance dropped
to 40dB and above. Although, this is not ideal it was maintained through the 25 GHz.
About Bree Engineering
Bree Engineering Corporation was founded in 1999 and is a manufacturer of custom electronic
filters, multiplexers, filter banks and other related types of components in the frequency
range of 0.1 MHz to 40 GHz. Contact Bree Engineering for specific applications, Bree
Engineering designs include Chebychev, Bessel, Butterworth, Gaussian, Transitional, Elliptic-Function
and Pseudo-Elliptic-Function filters. In addition to Lumped Element designs, Bree Engineering
also produces Cavity designs (Combline or Interdigital) and Ceramic Resonator designs.
Bree Engineering is known for our responsiveness to the needs of our customers, our
agility and our consistent on-time delivery.
All products are built to your specifications, so if you need a surface mount device
or one with connectors, high or low power handling, or optimized for price or any specification
parameter you need, we will tell you what is achievable, and explain all of the trade-offs
involved so you can make very well-informed decisions.
1275 Stone Drive
San Marcos, CA 92078
Posted September 24, 2018