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 Speed PCB Boards Built on RO4350B 10 mil with Immersion Gold
(Printed circuit boards are custom-made products, the picture and parameters shown are
Just for reference)

General description
this is a type of double sided high frequency PCB built on RO4350B 10 mil substrate for the
Application of antenna. It's a 2 layer RF PCB board at 0.3 mm thick. It's immersion gold finish
without solder mask. It's fabricated per IPC 6012 Class 2 using supplied Gerber data. Each
50 boards are packed for shipment. 

Features and benefits
Low water absorbability influences dielectric constant and dielectric loss less at damp.
Tg > 280
Good high temperature and low temperature resistance.(-192-260)
Gold has high solderability, no stressing of circuit boards and less contamination of PCB
Surface.
High voltage test, Impedance control test, micro-section, solder-ability test, 
PCB manufacturing is strictly as per required specifications. 
Eligible products rate of first production: >95%  
No MOQ, low cost for prototypes and samples. 
International approvals

Application
Low noise amplifier, Optical coupler, RF Switches, Automatic gate induction

Parameter and data sheet

PCB SIZE	10 x 10mm=1up
BOARD TYPE	Double sided PCB
Number of Layers	2 layers
Surface Mount Components	YES
through Hole Components	NO
LAYER STACKUP	Copper ------- 35um(1 oz)+plate TOP layer
	RO4350B 0.254mm
	Copper ------- 35um(1oz) + plate  BOT Layer
TECHNOLOGY
Minimum Trace and Space:	N/A
Minimum / Maximum Holes:	N/A
Number of Different Holes:	N/A
Number of Drill Holes:	0
Number of Milled Slots:	0
Number of Internal Cutouts:	0
Impedance Control:	no
Number of Gold finger:	0
BOARD MATERIAL
Glass Epoxy:	RO4350B Tg280, er<3.48, Rogers Corp.
Final foil external:	1.5 oz
Final foil internal:	N/A
Final height of PCB:	0.3 mm 0.1
PLATING and COATING
Surface Finish	Immersion gold, 87%
Solder Mask Apply to:	N/A
Solder Mask Color:	N/A
Solder Mask Type:	N/A
CONTOUR/CUTTING	Routing
MARKING
Side of Component Legend	N/A
Colour of Component Legend	N/A
Manufacturer Name or Logo:	N/A
VIA	NO
FLAMIBILITY RATING	UL 94-V0 Approval MIN.
DIMENSION TOLERANCE
Outline dimension:	0.0059"
Board plating:	0.0029"
Drill tolerance:	0.002"
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