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 Built on 10mil
(0.254mm) RO4350B 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 10mil RO4350B substrate with Tg 280C
for the application of WiFi Antenna. It's 0.3 mm thick with black silkscreen substrate
and immersion gold on pads. the base material is from Rogers supplying single up
Board. They're fabricated per IPC 6012 Class 2 using supplied Gerber data. Each 50
Boards are packed for shipment. 

Features and benefits
Heat resistance, chemical resistance, impact strength and peeling strength are good.
Reducing signal loss in high frequency application meets the development needs of
Communication technology.
Tg > 280,
Gold has high solderability, no stressing of circuit boards and less contamination of PCB
Surface.
100% tests inclusive of electrical test and AOI inspection.
Meeting your printed circuit board needs from PCB prototyping to mass volume production.
Customer complaint rate: <1% 
Great customer service;
Reduce manufacturing cost from advanced equipment import, worker training and
Technology improvement and management.


Application
GPS antennaWiFi amplifierRelay StationsMulticoupler


Parameter and data sheet

PCB SIZE	78 x 77 mm=1PCS
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(1 oz)+plate BOT layer
TECHNOLOGY
Minimum Trace and Space:	10 mil / - mil
Minimum / Maximum Holes:	0.4 mm / -mm
Number of Different Holes:	1
Number of Drill Holes:	2
Number of Milled Slots:	0
Number of Internal Cutouts:	0
Impedance Control:	no
Number of Gold finger:	0
BOARD MATERIAL
Glass Epoxy:	RO4350B Tg288, er<3.66, RogersCorp
Final foil external:	1 oz
Final foil internal:	1 oz
Final height of PCB:	0.3 mm 0.03
PLATING and COATING
Surface Finish	Immersion gold (51.3% ) 0.05m over 3m nickel
Solder Mask Apply to:	NO
Solder Mask Color:	NO
Solder Mask Type:	NO
CONTOUR/CUTTING	Routing
MARKING
Side of Component Legend	TOP
Colour of Component Legend	Black
Manufacturer Name or Logo:	N/A
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


Disposal before drill film