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 HASL ROHS Compliant
(Printed circuit boards 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 substrate with Tg 280C for the
Application of WiFi Amplifier. It's 0.80 mm thick with 2 layers copper, white silkscreen
over green solder mask and HASL are on pads. the base material is used from Rogers
Corp., entire board supplying 1 PCB up. They're fabricated per IPC 6012 Class 2 using
Supplied Gerber data. Each 25 boards are packed for shipment. 

Features and benefits
RO4350B exhibits a stable dielectric constant over a broad frequency range;
An ideal substrate for broadband applications;
Low water absorbability influences dielectric constant and dielectric loss less at damp;
Good high temperature and low temperature resistance(-192-260);
Reliability test, insulation resistance test and ionic contamination test;
8000 types of PCB per month;
Competitive price;
Quick turn-around samples;


Application
Preamplifier,Variocoupler,RF Identification,Power divider


Parameter and data sheet

PCB SIZE	142 x 92mm=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:	5 mil / 5 mil
Minimum / Maximum Holes:	0.4 mm / 5.2 mm
Number of Different Holes:	7
Number of Drill Holes:	95
Number of Milled Slots:	0
Number of Internal Cutouts:	3
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	HASL Lead free
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 0.4mm.
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


PCB board drilling