4 Things You Must Know About High Frequency PCB

1
4 Things to Know High Frequency PCB

• High Frequency Printed Circuit Board is a class
  of PCBs. These are mostly used in those
  applications which involve special signal
  transmissions. These mostly operate in the
  frequency range of 500 MHz to 2GHz. High
  frequency PCB is a viable choice for applications
  involving microwave, mobile, and radio frequency.
• Most of the electronic products today involve
  signal communication. This is more prominent in
  products that involve satellite and Wi-Fi
  systems. So, we look towards high frequency
  boards whenever we need a signal communication in
  our electronic products.
• Today we will discuss all high frequency PCB
  boards and how you can use them as per your needs
  and requirements.

MOKO TECHNOLOGY
https//www.mokotechnology.com/
2
Material Selection for High frequency PCB
Fabrication We mostly use high frequency
laminates in high frequency PCB. However, these
are often difficult to fabricate. Because they
must maintain the thermal heat transfer of the
application due to the sensitivity of the
transmitted signal. So, we need special materials
for high frequency PCB manufacturing. When you
are selecting a material for High frequency PCB,
you must keep the following in mind,
1
3
https//www.mokotechnology.com/
4
3
Fabrication
We mostly use high frequency laminates in high
frequency PCB. However, these are often difficult
to fabricate. Because they must maintain the
thermal heat transfer of the application due to
the sensitivity of the transmitted signal. So, we
need special materials for high frequency PCB
manufacturing. When you are selecting a material
for High frequency PCB, you must keep the
following in mind,
https//www.mokotechnology.com/
4
Fabrication
Dielectric constant It is the ability of a
material to store energy when we apply an
electric field. However, it is a directional
property which means that it will change with the
axis of the material. So, the material you intend
to use should have a small dielectric constant.
Therefore, it will deliver stable input and there
will be no delay in the transmission
signal. Dissipation Factor Your material should
also have a small dissipation factor. Because a
high dissipation factor can affect the quality of
the transmitted signal. However, a small
dissipation factor will allow for less signal
wastage.
https//www.mokotechnology.com/
5
Fabrication
Loss Tangent It depends on the molecular
structure of the material and it can affect the
RF material going through high frequencies. Proper
spacing It is important in terms of skin effect
and cross talk. Crosstalk takes place when the
PCB starts interacting with itself and we observe
undesired coupling between the components. So, we
need to ensure the minimum distance between the
plane and trace in order to avoid crosstalk. The
skin effect is related to the resistance of the
trace. However, skin effect becomes prominent as
the resistance increases. So, this can lead to
warming the board. Therefore, the trace length
and width must be such that it cant affect the
PCB at high frequencies.
https//www.mokotechnology.com/
6
Fabrication
The diameter of the VIA VIAs with smaller
diameters have low conductance hence, they are
more suited when we are dealing with high
frequencies. Coefficient of thermal expansion It
determines the impact of temperature on the size
of the material. So, this becomes important
during the assembly and drilling processes.
Because even a slight change in the temperature
can significantly alter the size of the material.
So, you must ensure that the thermal expansion of
the foil must be the same as that of the
substrate. Otherwise, the foil might dissociate
when we subject it to high temperatures.
https//www.mokotechnology.com/
7
Fabrication
So, based on these considerations, we recommend
the following materials for high frequency
PCB, Taconic RF-35 Ceramic Rogers RO3001 Taconic
TLX Rogers RO3003 ISOLA IS620 E-fiber
glass Rogers 4350B HF ARLON 85N
https//www.mokotechnology.com/
8
Features of High frequency PCB
Property Typical Value
Dielectric Constant 2.2-3.8
Dissipation Factor tan 0.0011-0.003
Volume Resistivity (M?/cm) 2.3108
Peel Strength (lbs. Per inch) 14
Arc Resistance (seconds) gt190
Surface Resistivity (M?) 3.5106
Thermal Coefficient of Er (PPM/?) -160
Tensile Modulus (kpsi) 270,219
Compressive Modulus (kpsi) 240
Dielectric Breakdown (KV) gt50
Water Absorption () 0.03
Thermal Conductivity 0.27
High frequency PCB is supposed to give excellent
performance. So, they have the following typical
features.
https//www.mokotechnology.com/
9
Benefits of High frequency
PCB
High frequency PCB service is a convenient choice
when it comes to wiring. Because they shorten the
connection between the various electronic
components and hence, they shorten the length of
the wiring. So, this consequently improves the
speed of signal transmission. High frequency PCB
allows the signal line to form a constant low
impedance to the ground. So, this significantly
reduces the circuit impedance and provides an
improved shielding effect. Most electronic
products have functional requirements of heat
dissipation and high frequency PCB are made from
such material that facilitates heat dissipation
hence, they are an ideal fit. The PCBs which we
use in telecommunication or high-speed products
are subjected to high frequencies. So, ordinary
PCBs cant function at these frequencies that is
why we need high frequency PCB.
https//www.mokotechnology.com/
10
Applications of High frequency
PCB
High frequency PCB has a range of applications
and we will take a look at some of them,
https//www.mokotechnology.com/
11
Applications of High frequency
PCB
Medical Applications We can use high frequency
PCB in healthcare or personal monitors such as
heart rate monitors, blood glucose monitors, and
blood pressure monitors. You can also use them in
medical scanners such as CT scanners, X-Ray
scanners, and MRI scanners. Also, we can also use
them in photometers and microscopes.
https//www.mokotechnology.com/
12
Applications of High frequency
PCB
Industrial Applications You can use these in
electric drills and electric presses. We may use
these for the measurement of various parameters
and controlling them. For example, pressure
measurement systems and temperature control
systems. Also, you can also use them in power
indicators of generators, solar panels, and
inverters.
https//www.mokotechnology.com/
13
Applications of High frequency
PCB
Advance Communication Applications High frequency
PCB enables the efficient transmission of sound
signals over long distances. So, this allows for
clear communication. We can use these for various
advanced communication functions such as
filtering and amplification. Also, we can use
these in microphones, mixing decks, booster
stations, and receivers. Radar systems We
extensively use High frequency PCB in RADAR
systems. These play an important role in the
marine and aviation industries. Submarines and
ships rely on these for detecting enemy
vessels. Also, aircraft use these for navigation
and safe landing.
https//www.mokotechnology.com/
14
If you are looking for high-frequency PCB and
cant find a reliable vendor then you shouldnt
worry. Because MOKO Technology is here to save
the day. MOKO Smart has vast experience in
manufacturing all kinds of PCBs, including
high-frequency PCB. We have a state-of-the-art
setup and we have the capability for mass
production. Also, our products are of premium
quality and have excellent performance hence, we
can deliver customized PCBs that are tailormade
to meet your needs. Feel free to contact us if
you want a quote or if you have any further
queries.
MOKO TECHNOLOGY