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 on 30 mil RO4350B
with Double Layers
(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 PCB built on high frequency substrate with Tg 288C for the
Application of Phone Signal Booster. It's 0.8 mm thick, white silkscreen over green solder
Mask. All via's are open to air. Pads are plated by immersion gold. the base material is
Used from Rogers RO4350B, entire board supplying 1 PCB up. They're fabricated per IPC
6012 Class 2 using supplied Gerber data. Each 25 panels are packed for shipment. 

Features and benefits
Stable electrical properties verus frequency;
Low thermal coefficient of dielectric constant;
Low Z-Axis expansion;
Low in-plane expansion coefficient;
Excellent dimensional stability;
Comprehensive equipment management and maintenance and process control;
Strict WIP inspection and monitoring as well as working instruction;
on-time service;
More than 15 years of experience;

Application
TV antenna,Antenna combiner,Balanced amplifier,Multi-coupler

Parameter and data sheet

PCB SIZE	54 x 55mm=1PCS
BOARD TYPE	Double sided PCB
Number of Layers	2 layers
Surface Mount Components	YES
through Hole Components	YES
LAYER STACKUP	Copper ------- 35um(1 oz)+plate TOP layer
	RO4350B 0.762mm
	Copper ------- 35um(1oz) + plate  BOT Layer
TECHNOLOGY
Minimum Trace and Space:	4.8 mil / 4.5 mil
Minimum / Maximum Holes:	0.3 mm / 4.6 mm
Number of Different Holes:	5
Number of Drill Holes:	87
Number of Milled Slots:	0
Number of Internal Cutouts:	1
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:	0.8 mm 10%
PLATING and COATING
Surface Finish	Immersion Gold
Solder Mask Apply to:	TOP, 12micron Minimum
Solder Mask Color:	Green, PSR-2000GT600D, Taiyo Supplied.
Solder Mask Type:	LPSM
CONTOUR/CUTTING	Routing
MARKING
Side of Component Legend	TOP
Colour of Component Legend	White, IJR-4000 MW300, Taiyo brand
Manufacturer Name or Logo:	Marked on the board in a conductor and leged FREE AREA
VIA	Plated through hole(PTH), minimum size 0.3mm. Solder mask uncovered
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