MP-90-370-37-S-75 - Lorch Microwave

Manual Phase Shifters

1725 N. Salisbury Blvd. · PO Box 2828 · Salisbury, MD 21802

Ph. 800-780-2169, 410-860-5100 · Fax 410-860-1949

Web http://www.lorch.com · E-mail lorchsales@lorch.com

Lorch Microwave’s MP-Series, Manual Phase Shifters, are

mechanically variable devices offering a continuously vari-

able phase shift over a 0-90 or 0-180 degree range. These

devices use a lumped element quadrature hybrid along

with a pair of matched variable LC networks. The LC net-

works are tied to ports 2 and 3 of the quad hybrid (See

Figure 1) to form a “sliding” short. These elements, when

placed at the output ports of the hybrid, will reflect inci-

dent energy back into the hybrid. The reflected energy

then appears at port 4, the isolated port. As the LC ele-

ments are varied, the apparent distance (or electrical

length) of the sliding short, changes the phase angle of the

reflected signal.

The phase adjustment is via a 34 turn mechanically vari-

able capacitor. Phase shift verses number of turns is shown

in Figure 2.

Notes:

1) All units rated at 0.5 Watts Avg, 2 Watts Peak. The Peak/Average

power handling capacity applies for thru-line VSWR’s of

1.25:1 max.

The units listed are designed to provide optimum performance over the

full 10% bandwidth. If the band of interest is narrower than listed, it

should be indicated when ordering (See “Creating a Part Number”).

Performance will be optimized over the band of interest and improved

performance may be offered at no extra cost.

Applications

❚

Closed-Loop Tracking System

❚

Fine Grain Phase Control

❚

Path Equalization or Balance

❚

10-1000 MHz Frequency Range

❚

10% Standard Bandwidth

❚

0-90°, 0-180° and 0-360°

Phase Shift Ranges

❚

Multi-Turn, Infinite Resolution

❚

Low Loss, High Phase Stability

❚

PC Mount and Connectorized

Frequency

(MHz) Bandwidth

10 - 500

20 - 500

INS

Loss (dB)

Phase

Shift

.............................

90°

180°

10%

1.3

1.8

VSWR

1.6:1

.............................

TYPICAL PERFORMANCE SPECIFICATIONS

FIGURE 1

SCHEMATIC

1725 N. Salisbury Blvd. · PO Box 2828 · Salisbury, MD 21802

Ph. 800-780-2169, 410-860-5100 · Fax 410-860-1949

Web http://www.lorch.com · E-mail lorchsales@lorch.com

Manual Phase Shifters

Creating a Part Number

Lorch Microwave’s MP-Series, Manual Phase Shifters, have

descriptive part numbers indicating the important electrical

characteristics that define the unit. A list of typical perform-

ance specifications are given in the preceding section. For

specifications outside these operating parameters, please

contact the factory.

OUTLINE, PC MOUNT OUTLINE, CONNECTORIZED

FIGURE 2

TYPICAL PHASE SHIFT VS. RELATIVE ROTATION

FIGURE 3

TYPICAL INSERTION LOSS VS. RELATIVE ROTATION

Relative Rotation (turns)

Phase ShiftInsertion Loss

MP 180 120 12

12345 6

S75

-- - -

Part Number Description

PSeries, Manual Phase Shifter

218

0Phase Shift in Degrees

3 120 Center Frequency in MHz

412 Bandwidth in MHz

5S Package Style, S-SMA, P-PC Mount

675 Input Impedance, if other than 50 Ohms