One2two stack match

Antenna one to two STACK MATCH with BiP/BoP function by OK2ZAW

Can be controlled by:

Stack Match is designed for the stack of antennas - do matching and power splitting to
two antennas. This Stack Match allows any of the four combinations for: upper - lower - Both In Phase(BIP) or Both Out Phase(BOP) antennas, vertically shaping the radiation lobes and changing the radiation take-off angle to optimize the signals depending on the varying ionospheric propagation angles.
Could be controlled independently for RX and TX - depends on controller.
Works with Mono-band antennas as well as Tri-band and Multi-band antennas! ( if wide band phase transformer is used )

Main functions:

Two outputs to one input.
Internal Wide Band or external Phase Shifter.
Own (QRO.cz) ferrite cores for high power with great HF parameters.
Two relays in series 2x16A in RF lines
High quality 2mm PCB
PTFE connectors PL-259 , UHF N or 7/16 DIN female with gold plated.
High quality ATC RF capacitors
Relay voltage 12V. Different on request.
Power consumption < 6W.
Aluminium shield enclosure.
Aluminium mounting holder with bracket.
Size 190 x 120 x 150 mm
Weight 1.4 kg

Compare antennas:

There is comparison of the four combinations of a stack of two five element Yagi antennas. The possible combinations are as follows:

TOP antenna in 30m / 99ft - BLACK color.

BOTTOM antenna in 15m / 50ft - RED color.

BIP - Both IN Phase antennas in 15/30m - 50/90ft - BLUE color. Second picture: BLACK color.

BOP - Both OUT Phase antennas in 15/30m - 50/90ft - GREEN color. Second picture: RED color.

Top - Bottom - Both In Phase
and Both Out of Phase

Both In Phase
and Both Out of Phase

Parameters:

Four versions: ( MP / HP and internal / external PH shifter )
Power handling *	< 3 kW	< 5 kW
Frequency range **	1,8-50 MHz	1,8-50 MHz
Characteristic impedance	50 ohm	50 ohm
Relay version	5 , 12 or 24 V	5 , 12 or 24 V
PCB thickness	2 mm	2 mm
The measured values: ( stack match optimized for 10-20m bands )
VSWR IN to ANT1
VSWR IN to ANT2
VSWR IN to ANT1 + ANT2 BIP
VSWR IN to ANT1 + ANT2 BOP (internal WB PH shifter)

*) Normal CW, SSB, RTTY DX operation. In contest mode: CW, SSB 75% and RTTY 50% of HF power.

**) Usually optimized for some bands. For example for 6m, 10-15-20m or 160-80-40, but it could be designed for all bands with some compromise.

Matrix table

	Stack match Inputs
Selected	A1	A2	Bal	PH
A1	+	-	-	-
A2	-	+	-	-
BIP	+	+	+	-
BOP	+	+	+	+
+ 12 or 5V / - NC

Download

Stack match
Version 7	pcb	sch	eagle152

We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD .DXF, or Inkscape .SVG files. The hardware designs are released under the Attribution-NonCommercial 2.0 Generic

Users implementation photos