Brief Introduction
Just as its name implies, high frequency is that the frequency is relatively high, generally refers
to the frequency of >=300 MHz (i.e. Wave length <=1m), that is, the usual radio frequency
Band. the electromagnetic wave of frequency >=1GHz is named microwave.
Typical frequencies for wireless applications:
* Current: 0.9GHz - 2GHz
* 3G systems: 2.5GHz
* Bluetooth: 2.5GHz
* GPS: 12.6GHz
* LMDS: 24GHz and 40GHz
* Automotive: 77GHz
Market: RFID, Wireless communications, base station and antenna, amplifier, military products,
Consumer electronics.  
High frequency printed circuit board or microwave PCB refers to the printed circuit board made
on the high frequency (microwave) substrate copper clad plate. the common types are: Double
-sided board, multilayer board and mixed structure.
Mixed structure includes high performance special substrate, PP sheet + ordinary performance
Board and PP sheet mixed pressing board; high frequency substrate + ordinary FR4 substrate;
High frequency substrate + metal base etc.


PCB Case: High Frequency PCB RO4350B 30 mil 2
Layer with Immersion Gold
(PCB's are custom-made products, the picture and parameters shown are just for
Reference)

General description
this is a type of high frequency PCB built on RO4350B for the application of balanced
Amplifier. It's a 2 layer RF PCB board at 0.8 mm thick. It's immersion gold finish with
Solder mask and silkscreen from Taiyo. It's fabricated per IPC 6012 Class 2 using
Supplied Gerber data. Each 10 boards are packed for shipment. 

Features and benefits
the dielectric constant (DK) is low and stable, so the signal transmission is good without
Delay.
the characteristic of low dielectric loss makes the signal loss at a lower level, which makes
the signal transmission of the whole equipment excellent.
Delamination of copper foil will not be caused by the change of cold and heat due to the
Consistency with the thermal expansion coefficient of copper foil. 
Immersion gold has excellent surface planarity, particularly helpful for PCBs with BGA
Packages or even CSP mounted components to reduce failure rate during assembly and
Soldering.
UL, ISO certified PCB manufacturing factory.
Make delivery on time keeping 98% on-time-delivery rate.
Eligible products rate of first production: >95%  
Experienced sales persons provide skilled customer services.
Fast and flexible to save the time of production from prototype to standard production

Application
Amplifier, Multicoupler, antenna, Sound control switch induction, Combiner

Parameter and data sheet

PCB SIZE	193 x 192mm=1PCS
BOARD TYPE
Number of Layers	Double sided PCB, 2 Layer PCB
Surface Mount Components	YES
through Hole Components	YES
LAYER STACKUP	Copper ------- 17.8um(0.5oz)+plate TOP layer
	RO4350B 30mil (0.762mm)
	Copper ------- 17.8um(1oz)+plate BOT Layer
TECHNOLOGY
Minimum Trace and Space:	11.97mil
Minimum / Maximum Holes:	0.3/2.8mm
Number of Different Holes:	2
Number of Drill Holes:	195
Number of Milled Slots:	5
Number of Internal Cutouts:	0
Impedance Control	No
BOARD MATERIAL
Glass Epoxy:	RO4350B 30mil (0.762mm), Tg 288
Final foil external:	1oz
Final foil internal:	0oz
Final height of PCB:	0.8mm 0.1
PLATING and COATING
Surface Finish	Immersion Gold (16.2%) 2 micoinch over 100 Microinch nickel
Solder Mask Apply to:	Top and Bottom, 12micron Minimum
Solder Mask Color:	Green, NAVN YA, LP-4G/G-05
Solder Mask Type:	LPSM
CONTOUR/CUTTING	Routing, Fiducial Marks
MARKING
Side of Component Legend	TOP
Colour of Component Legend	White, S-380W, Taiyo Supplied.
Manufacturer Name or Logo:	Marked on the board in a conductor and leged FREE AREA
VIA	Plated through Hole(PTH), via tented
FLAMIBILITY RATING	UL 94-V0 Approval MIN.
DIMENSION TOLERANCE
Outline dimension:	0.0059" (0.15mm)
Board plating:	0.0030" (0.076mm)
Drill tolerance:	0.002" (0.05mm)
TEST	100% Electrical Test prior shipment
TYPE of ARTWORK to BE SUPPLIED	Gerber RS-274-X, PCBDOC etc
SERVICE AREA	Worldwide, Globally.

Variety of PCBs


Ionic contamination tester