This is my code, why cant i get post per page and offset result ?.

<?php 
    $myquery['tax_query'] = array(
        'relation' => 'OR',
        'posts_per_page' => 3,
        'offset' => 3,
    array(
        'taxonomy' => 'brands',
        'terms' => array('iHOME'),
        'field' => 'slug',
        ));
    query_posts($myquery);?>
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<?php the_post_thumbnail();?>
<?php the_title();?>
<?php echo excerpt(25); ?>
<?php echo esc_html( get_post_meta( get_the_ID(), 'category', true ) ); ?>

<?php endwhile; else: ?>
<?php endif; ?>